Update travis test supports

.travis.yml

@@ -1,10 +1,17 @@
 language: ruby
+
 rvm:
-  - 2.1.2
-  - 2.0.0
-  - 1.9.3
+  - 2.0
+  - 2.2.3
+  - ruby-head
+  - jruby-9.0.4.0
+
 gemfile:
-  - gemfiles/rails_4.1.gemfile
+  - gemfiles/rails_4.2.gemfile
   - gemfiles/rails_4.0.gemfile
   - gemfiles/rails_3.2.gemfile
   - gemfiles/rails_3.1.gemfile
+
+matrix:
+  allow_failures:
+    - rvm: ruby-head

Appraisals

@@ -12,4 +12,4 @@ end
 
 appraise 'rails-4.1' do
   gem 'rails', '4.1.6'
-end
+end

README.md

@@ -20,10 +20,7 @@ It supports the following adapters:
 
 Supported platforms:
 
-* Ruby versions - 1.9.3, 2.0, 2.1 or greater
-* Rails versions - 3.1, 3.2, 4.0, 4.1 or greater
-
-(let me know if it works on lesser rails versions)
+* Rails versions - 3 and 4.
 
 ## Installation
 
@@ -222,12 +219,16 @@ This `remove_polymorphic_constraints` will delete all the existing `:imageable`
 ## Tests
 
 ```ruby
-rake
-rake test:unit
-rake test:integration:all
-rake test:integration:sqlite
-rake test:integration:postgresql
-rake test:integration:mysql
+$ rake
+$ rake test:unit
+$ rake test:integration:all
+$ rake test:integration:sqlite
+$ rake test:integration:postgresql
+$ rake test:integration:mysql
+
+# test different active model versions
+$ appraisal install
+$ appraisal rake
 ```
 
 ## Problems
@@ -246,11 +247,6 @@ Please use GitHub's [issue tracker](http://github.com/musaffa/polymorphic_constr
 4. Push to the branch (`git push origin my-new-feature`)
 5. Create a new Pull Request
 
-## Inspirations
-
-* [Foreigner](https://github.com/matthuhiggins/foreigner)
-* [Fides](https://github.com/mkraft/fides)
-
 ## License
 
 This project rocks and uses MIT-LICENSE.