.travis.yml in rack-dev-mark-0.7.3 vs .travis.yml in rack-dev-mark-0.7.4

- old
+ new

@@ -2,19 +2,23 @@
 
 rvm:
   - 1.9.3
   - 2.0.0
   - 2.1
+  - 2.2
 
 env:
   -
   - RACK_VERSION=1.1.0
   - RACK_VERSION=1.2.0
   - RACK_VERSION=1.3.0
   - RACK_VERSION=1.4.0
+  - RACK_VERSION=1.5.0
+  - RACK_VERSION=1.6.0
   - RAILS_VERSION=3.2.0
   - RAILS_VERSION=4.0.0
   - RAILS_VERSION=4.1.0
+  - RAILS_VERSION=4.2.0
   - I18N_VERSION=0.6.0
 
 script: "bundle exec rake spec"
 
 branches: