bump mysql2

Gemfile

@@ -63,7 +63,7 @@ gem 'autoprefixer-rails', '4.0.2.1'
 
 ENV['DB'] ||= 'mysql'
 
-gem 'mysql2', '0.3.17' if ENV['DB'] == 'all' || ENV['DB'] == 'mysql'
+gem 'mysql2', '0.3.18' if ENV['DB'] == 'all' || ENV['DB'] == 'mysql'
 gem 'pg',     '0.18.1' if ENV['DB'] == 'all' || ENV['DB'] == 'postgres'
 
 gem 'activerecord-import', '0.7.0'

Gemfile.lock

@@ -387,7 +387,7 @@ GEM
     multi_test (0.1.1)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
-    mysql2 (0.3.17)
+    mysql2 (0.3.18)
     nenv (0.2.0)
     nested_form (0.3.2)
     net-scp (1.2.1)
@@ -725,7 +725,7 @@ DEPENDENCIES
   mini_magick (= 4.1.0)
   minitest
   mobile-fu (= 1.3.1)
-  mysql2 (= 0.3.17)
+  mysql2 (= 0.3.18)
   nokogiri (= 1.6.4.1)
   omniauth (= 1.2.2)
   omniauth-facebook (= 1.6.0)