Update dependency to Rails.

Author: tgxworld

Gemfile.lock

@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     rails-controller-testing (0.0.3)
-      rails (>= 4.2.0.beta)
+      rails (>= 4.2)
 
 GEM
   remote: https://rubygems.org/
@@ -53,7 +53,7 @@ GEM
       nokogiri (>= 1.5.9)
     mail (2.6.3)
       mime-types (>= 1.16, < 3)
-    mime-types (2.5)
+    mime-types (2.6.1)
     mini_portile (0.6.2)
     minitest (5.6.1)
     nokogiri (1.6.6.2)

rails-controller-testing.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
   s.test_files = Dir["test/**/*"]
   s.require_path = ['lib']
 
-  s.add_dependency "rails", ">= 4.2.0.beta"
+  s.add_dependency "rails", ">= 4.2"
 
   s.add_development_dependency "sqlite3"
 end