Fix travis config for updated Gemfiles

Author: PikachuEXE

.travis.yml

@@ -14,10 +14,19 @@ matrix:
   allow_failures:
     - rvm: jruby-head
     - rvm: ruby-head
+  exclude:
     - rvm: 2.0
-      gemfile: gemfiles/Gemfile.activesupport-5.x
+      gemfile: gemfiles/activesupport_50.gemfile
     - rvm: 2.1
-      gemfile: gemfiles/Gemfile.activesupport-5.x
+      gemfile: gemfiles/activesupport_50.gemfile
+    - rvm: 2.0
+      gemfile: gemfiles/activesupport_51.gemfile
+    - rvm: 2.1
+      gemfile: gemfiles/activesupport_51.gemfile
+    - rvm: 2.0
+      gemfile: gemfiles/activesupport_52.gemfile
+    - rvm: 2.1
+      gemfile: gemfiles/activesupport_52.gemfile
 notifications:
   webhooks: https://www.travisbuddy.com/
   on_success: never