composer update michelf/php-markdown

11 files changed, 166 insertions, 153 deletions

diff --git a/vendor/michelf/php-markdown/.github/workflows/ci.yml b/vendor/michelf/php-markdown/.github/workflows/ci.yml
new file mode 100644
index 000000000..4103c86da
--- /dev/null
+++ b/vendor/michelf/php-markdown/.github/workflows/ci.yml
@@ -0,0 +1,30 @@
+name: CI
+on:
+    pull_request: null
+    push:
+        branches:
+            - lib
+jobs:
+    tests:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                php:
+                  - '7.4'
+                  - '8.0'
+                  - '8.1'
+                  - '8.2'
+
+        name: Linting - PHP ${{ matrix.php }}
+        steps:
+            -   uses: actions/checkout@v2
+            -   uses: shivammathur/setup-php@v2
+                with:
+                    php-version: ${{ matrix.php }}
+                    coverage: none
+                    extensions: intl
+            -   run: composer install --no-progress
+#            -   run: composer codestyle
+            -   run: composer phpstan
+                if:  matrix.php == '8.1'
+            -   run: composer tests
diff --git a/vendor/michelf/php-markdown/.scrutinizer.yml b/vendor/michelf/php-markdown/.scrutinizer.yml
index b4f5dfb9e..7542096df 100644
--- a/vendor/michelf/php-markdown/.scrutinizer.yml
+++ b/vendor/michelf/php-markdown/.scrutinizer.yml
@@ -1,7 +1,7 @@
 build:
   environment:
     php:
-      version: '7.0.20'
+      version: '7.4'
   nodes:
     analysis:
       project_setup:
diff --git a/vendor/michelf/php-markdown/.travis.yml b/vendor/michelf/php-markdown/.travis.yml
index 440045be3..5a2a16a4e 100644
--- a/vendor/michelf/php-markdown/.travis.yml
+++ b/vendor/michelf/php-markdown/.travis.yml
@@ -4,24 +4,10 @@ matrix:
   include:
     - php: hhvm-3.18
       dist: trusty
-    - php: 5.3
-      dist: precise
-    - php: 5.4
-      dist: trusty
-    - php: 5.5
-      dist: trusty
-    - php: 5.6
-      dist: xenial
-    - php: 7.0
-      dist: xenial
-    - php: 7.1
-      dist: bionic
-    - php: 7.2
-      dist: bionic
-    - php: 7.3
-      dist: bionic
     - php: 7.4
       dist: bionic
+    - php: 8.0
+      dist: bionic
 
 install:
   - composer install --prefer-dist
diff --git a/vendor/michelf/php-markdown/License.md b/vendor/michelf/php-markdown/License.md
index 25d1e16b6..4a5bddd55 100644
--- a/vendor/michelf/php-markdown/License.md
+++ b/vendor/michelf/php-markdown/License.md
@@ -1,5 +1,5 @@
 PHP Markdown Lib  
-Copyright (c) 2004-2021 Michel Fortin
+Copyright (c) 2004-2022 Michel Fortin
 <https://michelf.ca/>  
 All rights reserved.
 
diff --git a/vendor/michelf/php-markdown/Michelf/Markdown.php b/vendor/michelf/php-markdown/Michelf/Markdown.php
index f644080c7..746a2d048 100644
--- a/vendor/michelf/php-markdown/Michelf/Markdown.php
+++ b/vendor/michelf/php-markdown/Michelf/Markdown.php
@@ -4,7 +4,7 @@
  *
  * @package   php-markdown
  * @author    Michel Fortin <michel.fortin@michelf.com>
- * @copyright 2004-2021 Michel Fortin <https://michelf.com/projects/php-markdown/>
+ * @copyright 2004-2022 Michel Fortin <https://michelf.com/projects/php-markdown/>
  * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
  */
 
@@ -18,7 +18,7 @@ class Markdown implements MarkdownInterface {
 	 * Define the package version
 	 * @var string
 	 */
-	const MARKDOWNLIB_VERSION = "1.9.1";
+	const MARKDOWNLIB_VERSION = "2.0.0";
 
 	/**
 	 * Simple function interface - Initialize the parser and return the result
@@ -29,9 +29,9 @@ class Markdown implements MarkdownInterface {
 	 * @param  string $text
 	 * @return string
 	 */
-	public static function defaultTransform($text) {
+	public static function defaultTransform(string $text): string {
 		// Take parser class on which this function was called.
-		$parser_class = \get_called_class();
+		$parser_class = static::class;
 
 		// Try to take parser from the static parser list
 		static $parser_list;
@@ -49,39 +49,34 @@ class Markdown implements MarkdownInterface {
 	/**
 	 * Configuration variables
 	 */
-
 	/**
 	 * Change to ">" for HTML output.
-	 * @var string
 	 */
-	public $empty_element_suffix = " />";
+	public string $empty_element_suffix = " />";
 
 	/**
 	 * The width of indentation of the output markup
-	 * @var int
 	 */
-	public $tab_width = 4;
+	public int $tab_width = 4;
 
 	/**
 	 * Change to `true` to disallow markup or entities.
-	 * @var boolean
 	 */
-	public $no_markup   = false;
-	public $no_entities = false;
+	public bool $no_markup   = false;
+	public bool $no_entities = false;
 
 
 	/**
 	 * Change to `true` to enable line breaks on \n without two trailling spaces
 	 * @var boolean
 	 */
-	public $hard_wrap = false;
+	public bool $hard_wrap = false;
 
 	/**
 	 * Predefined URLs and titles for reference links and images.
-	 * @var array
 	 */
-	public $predef_urls   = array();
-	public $predef_titles = array();
+	public array $predef_urls   = array();
+	public array $predef_titles = array();
 
 	/**
 	 * Optional filter function for URLs
@@ -121,32 +116,27 @@ class Markdown implements MarkdownInterface {
 	 * <li>List item two</li>
 	 * <li>List item three</li>
 	 * </ol>
-	 *
-	 * @var bool
 	 */
-	public $enhanced_ordered_list = false;
+	public bool $enhanced_ordered_list = false;
 
 	/**
 	 * Parser implementation
 	 */
-
 	/**
 	 * Regex to match balanced [brackets].
 	 * Needed to insert a maximum bracked depth while converting to PHP.
-	 * @var int
 	 */
-	protected $nested_brackets_depth = 6;
-	protected $nested_brackets_re;
+	protected int $nested_brackets_depth = 6;
+	protected string $nested_brackets_re;
 
-	protected $nested_url_parenthesis_depth = 4;
-	protected $nested_url_parenthesis_re;
+	protected int $nested_url_parenthesis_depth = 4;
+	protected string $nested_url_parenthesis_re;
 
 	/**
 	 * Table of hash values for escaped characters:
-	 * @var string
 	 */
-	protected $escape_chars = '\`*_{}[]()>#+-.!';
-	protected $escape_chars_re;
+	protected string $escape_chars = '\`*_{}[]()>#+-.!';
+	protected string $escape_chars_re;
 
 	/**
 	 * Constructor function. Initialize appropriate member variables.
@@ -175,23 +165,20 @@ class Markdown implements MarkdownInterface {
 
 	/**
 	 * Internal hashes used during transformation.
-	 * @var array
 	 */
-	protected $urls        = array();
-	protected $titles      = array();
-	protected $html_hashes = array();
+	protected array $urls        = array();
+	protected array $titles      = array();
+	protected array $html_hashes = array();
 
 	/**
 	 * Status flag to avoid invalid nesting.
-	 * @var boolean
 	 */
-	protected $in_anchor = false;
+	protected bool $in_anchor = false;
 
 	/**
 	 * Status flag to avoid invalid nesting.
-	 * @var boolean
 	 */
-	protected $in_emphasis_processing = false;
+	protected bool $in_emphasis_processing = false;
 
 	/**
 	 * Called before the transformation process starts to setup parser states.
@@ -226,7 +213,7 @@ class Markdown implements MarkdownInterface {
 	 * @param  string $text
 	 * @return string
 	 */
-	public function transform($text) {
+	public function transform(string $text): string {
 		$this->setup();
 
 		# Remove UTF-8 BOM and marker character in input, if present.
@@ -263,9 +250,8 @@ class Markdown implements MarkdownInterface {
 
 	/**
 	 * Define the document gamut
-	 * @var array
 	 */
-	protected $document_gamut = array(
+	protected array $document_gamut = array(
 		// Strip link definitions, store in hashes.
 		"stripLinkDefinitions" => 20,
 		"runBasicBlockGamut"   => 30,
@@ -525,9 +511,8 @@ class Markdown implements MarkdownInterface {
 	/**
 	 * Define the block gamut - these are all the transformations that form
 	 * block-level tags like paragraphs, headers, and list items.
-	 * @var array
 	 */
-	protected $block_gamut = array(
+	protected array $block_gamut = array(
 		"doHeaders"         => 10,
 		"doHorizontalRules" => 20,
 		"doLists"           => 40,
@@ -597,9 +582,8 @@ class Markdown implements MarkdownInterface {
 	/**
 	 * These are all the transformations that occur *within* block-level
 	 * tags like paragraphs, headers, and list items.
-	 * @var array
 	 */
-	protected $span_gamut = array(
+	protected array $span_gamut = array(
 		// Process character escapes, code spans, and inline HTML
 		// in one shot.
 		"parseSpan"           => -30,
@@ -724,7 +708,7 @@ class Markdown implements MarkdownInterface {
 
 	/**
 	 * Callback method to parse referenced anchors
-	 * @param  string $matches
+	 * @param  array $matches
 	 * @return string
 	 */
 	protected function _doAnchors_reference_callback($matches) {
@@ -763,7 +747,7 @@ class Markdown implements MarkdownInterface {
 
 	/**
 	 * Callback method to parse inline anchors
-	 * @param  string $matches
+	 * @param  array $matches
 	 * @return string
 	 */
 	protected function _doAnchors_inline_callback($matches) {
@@ -781,7 +765,7 @@ class Markdown implements MarkdownInterface {
 		$url = $this->encodeURLAttribute($url);
 
 		$result = "<a href=\"$url\"";
-		if (isset($title)) {
+		if ($title) {
 			$title = $this->encodeAttribute($title);
 			$result .=  " title=\"$title\"";
 		}
@@ -1105,9 +1089,8 @@ class Markdown implements MarkdownInterface {
 
 	/**
 	 * Nesting tracker for list levels
-	 * @var integer
 	 */
-	protected $list_level = 0;
+	protected int $list_level = 0;
 
 	/**
 	 * Process the contents of a single ordered or unordered list, splitting it
@@ -1248,7 +1231,7 @@ class Markdown implements MarkdownInterface {
 	 * Define the emphasis operators with their regex matches
 	 * @var array
 	 */
-	protected $em_relist = array(
+	protected array $em_relist = array(
 		''  => '(?:(?<!\*)\*(?!\*)|(?<!_)_(?!_))(?![\.,:;]?\s)',
 		'*' => '(?<![\s*])\*(?!\*)',
 		'_' => '(?<![\s_])_(?!_)',
@@ -1258,7 +1241,7 @@ class Markdown implements MarkdownInterface {
 	 * Define the strong operators with their regex matches
 	 * @var array
 	 */
-	protected $strong_relist = array(
+	protected array $strong_relist = array(
 		''   => '(?:(?<!\*)\*\*(?!\*)|(?<!_)__(?!_))(?![\.,:;]?\s)',
 		'**' => '(?<![\s*])\*\*(?!\*)',
 		'__' => '(?<![\s_])__(?!_)',
@@ -1268,7 +1251,7 @@ class Markdown implements MarkdownInterface {
 	 * Define the emphasis + strong operators with their regex matches
 	 * @var array
 	 */
-	protected $em_strong_relist = array(
+	protected array $em_strong_relist = array(
 		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<!_)___(?!_))(?![\.,:;]?\s)',
 		'***' => '(?<![\s*])\*\*\*(?!\*)',
 		'___' => '(?<![\s_])___(?!_)',
@@ -1276,9 +1259,8 @@ class Markdown implements MarkdownInterface {
 
 	/**
 	 * Container for prepared regular expressions
-	 * @var array
 	 */
-	protected $em_strong_prepared_relist;
+	protected ?array $em_strong_prepared_relist = null;
 
 	/**
 	 * Prepare regular expressions for searching emphasis tokens in any
@@ -1826,7 +1808,7 @@ class Markdown implements MarkdownInterface {
 	/**
 	 * String length function for detab. `_initDetab` will create a function to
 	 * handle UTF-8 if the default function does not exist.
-	 * @var string
+	 * can be a string or function
 	 */
 	protected $utf8_strlen = 'mb_strlen';
 
@@ -1883,9 +1865,7 @@ class Markdown implements MarkdownInterface {
 			return;
 		}
 
-		$this->utf8_strlen = function($text) {
-			return preg_match_all('/[\x00-\xBF]|[\xC0-\xFF][\x80-\xBF]*/', $text, $m);
-		};
+		$this->utf8_strlen = fn($text) => preg_match_all('/[\x00-\xBF]|[\xC0-\xFF][\x80-\xBF]*/', $text, $m);
 	}
 
 	/**
diff --git a/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php b/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
index 888f5f28d..e620f9e99 100644
--- a/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
+++ b/vendor/michelf/php-markdown/Michelf/MarkdownExtra.php
@@ -4,7 +4,7 @@
  *
  * @package   php-markdown
  * @author    Michel Fortin <michel.fortin@michelf.com>
- * @copyright 2004-2021 Michel Fortin <https://michelf.com/projects/php-markdown/>
+ * @copyright 2004-2022 Michel Fortin <https://michelf.com/projects/php-markdown/>
  * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
  */
 
@@ -17,25 +17,21 @@ class MarkdownExtra extends \Michelf\Markdown {
 	/**
 	 * Configuration variables
 	 */
-
 	/**
 	 * Prefix for footnote ids.
-	 * @var string
 	 */
-	public $fn_id_prefix = "";
+	public string $fn_id_prefix = "";
 
 	/**
 	 * Optional title attribute for footnote links.
-	 * @var string
 	 */
-	public $fn_link_title = "";
+	public string $fn_link_title = "";
 
 	/**
 	 * Optional class attribute for footnote links and backlinks.
-	 * @var string
 	 */
-	public $fn_link_class     = "footnote-ref";
-	public $fn_backlink_class = "footnote-backref";
+	public string $fn_link_class     = "footnote-ref";
+	public string $fn_backlink_class = "footnote-backref";
 
 	/**
 	 * Content to be displayed within footnote backlinks. The default is '↩';
@@ -43,59 +39,51 @@ class MarkdownExtra extends \Michelf\Markdown {
 	 * from displaying the arrow character as an emoji.
 	 * Optionally use '^^' and '%%' to refer to the footnote number and
 	 * reference number respectively. {@see parseFootnotePlaceholders()}
-	 * @var string
 	 */
-	public $fn_backlink_html = '&#8617;&#xFE0E;';
+	public string $fn_backlink_html = '&#8617;&#xFE0E;';
 
 	/**
 	 * Optional title and aria-label attributes for footnote backlinks for
 	 * added accessibility (to ensure backlink uniqueness).
 	 * Use '^^' and '%%' to refer to the footnote number and reference number
 	 * respectively. {@see parseFootnotePlaceholders()}
-	 * @var string
 	 */
-	public $fn_backlink_title = "";
-	public $fn_backlink_label = "";
+	public string $fn_backlink_title = "";
+	public string $fn_backlink_label = "";
 
 	/**
 	 * Class name for table cell alignment (%% replaced left/center/right)
 	 * For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center'
 	 * If empty, the align attribute is used instead of a class name.
-	 * @var string
 	 */
-	public $table_align_class_tmpl = '';
+	public string $table_align_class_tmpl = '';
 
 	/**
 	 * Optional class prefix for fenced code block.
-	 * @var string
 	 */
-	public $code_class_prefix = "";
+	public string $code_class_prefix = "";
 
 	/**
 	 * Class attribute for code blocks goes on the `code` tag;
 	 * setting this to true will put attributes on the `pre` tag instead.
-	 * @var boolean
 	 */
-	public $code_attr_on_pre = false;
+	public bool $code_attr_on_pre = false;
 
 	/**
 	 * Predefined abbreviations.
-	 * @var array
 	 */
-	public $predef_abbr = array();
+	public array $predef_abbr = array();
 
 	/**
 	 * Only convert atx-style headers if there's a space between the header and #
-	 * @var boolean
 	 */
-	public $hashtag_protection = false;
+	public bool $hashtag_protection = false;
 
 	/**
 	 * Determines whether footnotes should be appended to the end of the document.
 	 * If true, footnote html can be retrieved from $this->footnotes_assembled.
-	 * @var boolean
 	 */
-	public $omit_footnotes = false;
+	public bool $omit_footnotes = false;
 
 
 	/**
@@ -107,9 +95,8 @@ class MarkdownExtra extends \Michelf\Markdown {
 	 * `section` that will enclose the list of footnotes so they are
 	 * reachable to accessibility tools the same way they would be with the
 	 * default HTML output.
-	 * @var null|string
 	 */
-	public $footnotes_assembled = null;
+	public ?string $footnotes_assembled = null;
 
 	/**
 	 * Parser implementation
@@ -149,27 +136,23 @@ class MarkdownExtra extends \Michelf\Markdown {
 
 	/**
 	 * Extra variables used during extra transformations.
-	 * @var array
 	 */
-	protected $footnotes = array();
-	protected $footnotes_ordered = array();
-	protected $footnotes_ref_count = array();
-	protected $footnotes_numbers = array();
-	protected $abbr_desciptions = array();
-	/** @var string */
-	protected $abbr_word_re = '';
+	protected array $footnotes = array();
+	protected array $footnotes_ordered = array();
+	protected array $footnotes_ref_count = array();
+	protected array $footnotes_numbers = array();
+	protected array $abbr_desciptions = array();
+	protected string $abbr_word_re = '';
 
 	/**
 	 * Give the current footnote number.
-	 * @var integer
 	 */
-	protected $footnote_counter = 1;
+	protected int $footnote_counter = 1;
 
     /**
-     * Ref attribute for links
-     * @var array
-     */
-	protected $ref_attr = array();
+	 * Ref attribute for links
+	 */
+	protected array $ref_attr = array();
 
 	/**
 	 * Setting up Extra-specific variables.
@@ -215,18 +198,15 @@ class MarkdownExtra extends \Michelf\Markdown {
 	/**
 	 * Extra attribute parser
 	 */
-
 	/**
 	 * Expression to use to catch attributes (includes the braces)
-	 * @var string
 	 */
-	protected $id_class_attr_catch_re = '\{((?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}';
+	protected string $id_class_attr_catch_re = '\{((?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}';
 
 	/**
 	 * Expression to use when parsing in a context when no capture is desired
-	 * @var string
 	 */
-	protected $id_class_attr_nocatch_re = '\{(?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}';
+	protected string $id_class_attr_nocatch_re = '\{(?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}';
 
 	/**
 	 * Parse attributes caught by the $this->id_class_attr_catch_re expression
@@ -340,37 +320,31 @@ class MarkdownExtra extends \Michelf\Markdown {
 	/**
 	 * HTML block parser
 	 */
-
 	/**
 	 * Tags that are always treated as block tags
-	 * @var string
 	 */
-	protected $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure|details|summary';
+	protected string $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure|details|summary';
 
 	/**
 	 * Tags treated as block tags only if the opening tag is alone on its line
-	 * @var string
 	 */
-	protected $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video';
+	protected string $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video';
 
 	/**
 	 * Tags where markdown="1" default to span mode:
-	 * @var string
 	 */
-	protected $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address';
+	protected string $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address';
 
 	/**
 	 * Tags which must not have their contents modified, no matter where
 	 * they appear
-	 * @var string
 	 */
-	protected $clean_tags_re = 'script|style|math|svg';
+	protected string $clean_tags_re = 'script|style|math|svg';
 
 	/**
 	 * Tags that do not need to be closed.
-	 * @var string
 	 */
-	protected $auto_close_tags_re = 'hr|img|param|source|track';
+	protected string $auto_close_tags_re = 'hr|img|param|source|track';
 
 	/**
 	 * Hashify HTML Blocks and "clean tags".
@@ -627,6 +601,7 @@ class MarkdownExtra extends \Michelf\Markdown {
 			else {
 				$parsed .= $tag;
 			}
+			// @phpstan-ignore-next-line
 		} while ($depth >= 0);
 
 		return array($parsed, $text);
@@ -708,7 +683,7 @@ class MarkdownExtra extends \Michelf\Markdown {
 			// by the pattern.
 			$parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
 
-			if (count($parts) < 3) {
+			if ($parts === false || count($parts) < 3) {
 				// End of $text reached with unbalenced tag(s).
 				// In that case, we return original text unchanged and pass the
 				// first character as filtered to prevent an infinite loop in the
@@ -1248,6 +1223,7 @@ class MarkdownExtra extends \Michelf\Markdown {
 		$head		= $matches[1];
 		$underline	= $matches[2];
 		$content	= $matches[3];
+		$attr       = [];
 
 		// Remove any tailing pipes for each line.
 		$head		= preg_replace('/[|] *$/m', '', $head);
@@ -1549,17 +1525,17 @@ class MarkdownExtra extends \Michelf\Markdown {
 	 * work in the middle of a word.
 	 * @var array
 	 */
-	protected $em_relist = array(
+	protected array $em_relist = array(
 		''  => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?![\.,:;]?\s)',
 		'*' => '(?<![\s*])\*(?!\*)',
 		'_' => '(?<![\s_])_(?![a-zA-Z0-9_])',
 	);
-	protected $strong_relist = array(
+	protected array $strong_relist = array(
 		''   => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?![\.,:;]?\s)',
 		'**' => '(?<![\s*])\*\*(?!\*)',
 		'__' => '(?<![\s_])__(?![a-zA-Z0-9_])',
 	);
-	protected $em_strong_relist = array(
+	protected array $em_strong_relist = array(
 		''    => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?![\.,:;]?\s)',
 		'***' => '(?<![\s*])\*\*\*(?!\*)',
 		'___' => '(?<![\s_])___(?![a-zA-Z0-9_])',
diff --git a/vendor/michelf/php-markdown/Michelf/MarkdownInterface.php b/vendor/michelf/php-markdown/Michelf/MarkdownInterface.php
index 32069dff2..84e654590 100644
--- a/vendor/michelf/php-markdown/Michelf/MarkdownInterface.php
+++ b/vendor/michelf/php-markdown/Michelf/MarkdownInterface.php
@@ -4,7 +4,7 @@
  *
  * @package   php-markdown
  * @author    Michel Fortin <michel.fortin@michelf.com>
- * @copyright 2004-2021 Michel Fortin <https://michelf.com/projects/php-markdown/>
+ * @copyright 2004-2022 Michel Fortin <https://michelf.com/projects/php-markdown/>
  * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
  */
 
@@ -23,7 +23,7 @@ interface MarkdownInterface {
 	 * @param  string $text
 	 * @return string
 	 */
-	public static function defaultTransform($text);
+	public static function defaultTransform(string $text): string;
 
 	/**
 	 * Main function. Performs some preprocessing on the input text
@@ -34,5 +34,5 @@ interface MarkdownInterface {
 	 * @param  string $text
 	 * @return string
 	 */
-	public function transform($text);
+	public function transform(string $text): string;
 }
diff --git a/vendor/michelf/php-markdown/Readme.md b/vendor/michelf/php-markdown/Readme.md
index 1a0ee06eb..b9f273ac6 100644
--- a/vendor/michelf/php-markdown/Readme.md
+++ b/vendor/michelf/php-markdown/Readme.md
@@ -1,7 +1,7 @@
 PHP Markdown
 ============
 
-PHP Markdown Lib 1.9.1 - 23 Nov 2021
+![ci.yml](https://github.com/michelf/php-markdown/actions/workflows/ci.yml/badge.svg)
 
 by Michel Fortin  
 <https://michelf.ca/>
@@ -34,15 +34,14 @@ program by John Gruber.
 Requirement
 -----------
 
-This library package requires PHP 5.3 or later.
+This library package requires PHP 7.4 or later.
 
 Note: The older plugin/library hybrid package for PHP Markdown and
 PHP Markdown Extra is no longer maintained but will work with PHP 4.0.5 and
 later.
 
-Before PHP 5.3.7, pcre.backtrack_limit defaults to 100 000, which is too small
-in many situations. You might need to set it to higher values. Later PHP
-releases defaults to 1 000 000, which is usually fine.
+You might need to set pcre.backtrack_limit higher than 1 000 000 
+(the default), though the default is usually fine.
 
 
 Usage
@@ -183,6 +182,20 @@ PHP Markdown, please visit [michelf.ca/donate].
 Version History
 ---------------
 
+PHP Markdown Lib 2.0.0 (26 Sep 2022)
+
+*	Now requiring PHP version 7.4 or later.
+
+*	Added type annotations to configuration properties of the parser.
+	(Thanks to Tac Tacelosky.)
+
+*	Fixing a TypeError in PHP 8 caused by invalid counter variable.
+	(Thanks to Alexey Kopytko.)
+	
+*	Composer package now excludes development files.
+	(Thanks to Cédric Anne.)
+	
+
 PHP Markdown Lib 1.9.1 (23 Nov 2021)
 
 *	Now treating `<details>` and `<summary>` as block level so they don't
@@ -410,7 +423,7 @@ Copyright and License
 ---------------------
 
 PHP Markdown Lib
-Copyright (c) 2004-2021 Michel Fortin
+Copyright (c) 2004-2022 Michel Fortin
 <https://michelf.ca/>  
 All rights reserved.
 
diff --git a/vendor/michelf/php-markdown/composer.json b/vendor/michelf/php-markdown/composer.json
index 093507554..7cb59cf85 100644
--- a/vendor/michelf/php-markdown/composer.json
+++ b/vendor/michelf/php-markdown/composer.json
@@ -18,12 +18,37 @@
 		}
 	],
 	"require": {
-		"php": ">=5.3.0"
+		"php": ">=7.4"
 	},
 	"autoload": {
  		"psr-4": { "Michelf\\": "Michelf/" }
 	},
 	"require-dev": {
-		"phpunit/phpunit": ">=4.3 <5.8"
+		"friendsofphp/php-cs-fixer": "^3.0",
+		"phpunit/phpunit": "^9.5",
+		"phpstan/phpstan": ">=1.0",
+		"phpstan/phpstan-phpunit": ">=1.0"
+	},
+
+	"scripts": {
+		"tests": "vendor/bin/phpunit test/",
+		"phpstan": [
+			"vendor/bin/phpstan analyse Michelf/ --level=5",
+			"vendor/bin/phpstan analyse -c test/phpstan.neon test/ --level=5"
+		],
+		"codestyle": "vendor/bin/php-cs-fixer fix Michelf --dry-run --verbose --show-progress=none",
+		"codestyle-fix": "vendor/bin/php-cs-fixer fix Michelf"
+	},
+
+	"archive": {
+		"exclude": [
+			"/.github/",
+			"/test/",
+			"/.editorconfig",
+			"/.gitignore",
+			"/.scrutinizer.yml",
+			"/.travis.yml",
+			"/phpunit.xml.dist"
+		]
 	}
 }
diff --git a/vendor/michelf/php-markdown/test/helpers/MarkdownTestHelper.php b/vendor/michelf/php-markdown/test/helpers/MarkdownTestHelper.php
index ffca0c969..fc746366c 100644
--- a/vendor/michelf/php-markdown/test/helpers/MarkdownTestHelper.php
+++ b/vendor/michelf/php-markdown/test/helpers/MarkdownTestHelper.php
@@ -22,7 +22,6 @@ class MarkdownTestHelper
 
 		$dataValues = array();
 
-		/** @var SplFileInfo $inputFile */
 		foreach ($regexIterator as $inputFiles) {
 			foreach ($inputFiles as $inputMarkdownPath) {
 				$xhtml = true;
@@ -163,6 +162,7 @@ class MarkdownTestHelper
 		foreach ($node_list as $node) {
 			switch ($node->nodeType) {
 				case XML_ELEMENT_NODE:
+					/** @var DOMElement $node */
 					static::normalizeElementContent($node, $whitespace_preserve);
 					static::normalizeElementAttributes($node);
 
@@ -207,6 +207,7 @@ class MarkdownTestHelper
 					break;
 
 				case XML_TEXT_NODE:
+					/** @var DOMText $node */
 					if (!$whitespace_preserve) {
 						if (trim($node->data) === "") {
 							$node->data = $whitespace;
@@ -222,8 +223,8 @@ class MarkdownTestHelper
 			($whitespace === "\n\n" || $whitespace === "\n")) {
 			if ($element->firstChild) {
 				if ($element->firstChild->nodeType == XML_TEXT_NODE) {
-					$element->firstChild->data =
-						preg_replace('{^\s+}', "\n", $element->firstChild->data);
+					$element->firstChild->data = // @phpstan-ignore-line
+						preg_replace('{^\s+}', "\n", $element->firstChild->data ?? '');
 				}
 				else {
 					$element->insertBefore(new DOMText("\n"), $element->firstChild);
@@ -231,8 +232,8 @@ class MarkdownTestHelper
 			}
 			if ($element->lastChild) {
 				if ($element->lastChild->nodeType == XML_TEXT_NODE) {
-					$element->lastChild->data =
-						preg_replace('{\s+$}', "\n", $element->lastChild->data);
+					$element->lastChild->data = // @phpstan-ignore-line
+						preg_replace('{\s+$}', "\n", $element->lastChild->data ?? '');
 				}
 				else {
 					$element->insertBefore(new DOMText("\n"), null);
diff --git a/vendor/michelf/php-markdown/test/phpstan.neon b/vendor/michelf/php-markdown/test/phpstan.neon
new file mode 100644
index 000000000..e385cc80d
--- /dev/null
+++ b/vendor/michelf/php-markdown/test/phpstan.neon
@@ -0,0 +1,2 @@
+includes:
+    - ../vendor/phpstan/phpstan-phpunit/extension.neon