Start Rails 6.0 development!!!

:tada::tada::tada:

2 files changed, 4 insertions, 34 deletions

diff --git a/actionmailer/CHANGELOG.md b/actionmailer/CHANGELOG.md
index 04bbae8495..b2a1c570e5 100644
--- a/actionmailer/CHANGELOG.md
+++ b/actionmailer/CHANGELOG.md
@@ -1,33 +1,3 @@
-*   Bring back proc with arity of 1 in `ActionMailer::Base.default` proc
-    since it was supported in Rails 5.0 but not deprecated.
 
-    *Jimmy Bourassa*
 
-
-## Rails 5.2.0.beta2 (November 28, 2017) ##
-
-*   No changes.
-
-
-## Rails 5.2.0.beta1 (November 27, 2017) ##
-
-*   Add `assert_enqueued_email_with` test helper.
-
-        assert_enqueued_email_with ContactMailer, :welcome do
-          ContactMailer.welcome.deliver_later
-        end
-
-    *Mikkel Malmberg*
-
-*   Allow Action Mailer classes to configure their delivery job.
-
-        class MyMailer < ApplicationMailer
-          self.delivery_job = MyCustomDeliveryJob
-
-          ...
-        end
-
-    *Matthew Mongeau*
-
-
-Please check [5-1-stable](https://github.com/rails/rails/blob/5-1-stable/actionmailer/CHANGELOG.md) for previous changes.
+Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/actionmailer/CHANGELOG.md) for previous changes.
diff --git a/actionmailer/lib/action_mailer/gem_version.rb b/actionmailer/lib/action_mailer/gem_version.rb
index 6a7dd0a212..72eb5d61e8 100644
--- a/actionmailer/lib/action_mailer/gem_version.rb
+++ b/actionmailer/lib/action_mailer/gem_version.rb
@@ -7,10 +7,10 @@ module ActionMailer
   end
 
   module VERSION
-    MAJOR = 5
-    MINOR = 2
+    MAJOR = 6
+    MINOR = 0
     TINY  = 0
-    PRE   = "beta2"
+    PRE   = "alpha"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end