Bump mysql2 version

Skip 0.4.8 and 0.4.9, which had
[Compilation failures against MariaDB Connector/C 3.0.2](https://github.com/brianmario/mysql2/releases/tag/0.4.10).

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index 4fc4ea1009..4ec537d1ae 100644
--- a/Gemfile
+++ b/Gemfile
@@ -131,7 +131,7 @@ platforms :ruby, :mswin, :mswin64, :mingw, :x64_mingw do
 
   group :db do
     gem "pg", ">= 0.18.0"
-    gem "mysql2", ">= 0.4.4"
+    gem "mysql2", ">= 0.4.10"
   end
 end