Travis: Test against node.js 4 and 5 and Ruby 2.2.

.travis.yml

@@ -6,11 +6,12 @@ git:
   depth: 10
 
 node_js:
-  - "0.12"
+  - "4"
+  - "5"
 
 env:
   matrix:
-    - RUBY_VERSION=2.0
+    - RUBY_VERSION=2.2
 
 before_install:
   - rvm install $RUBY_VERSION
@@ -20,7 +21,7 @@ before_install:
 install:
   - travis_retry npm install -g grunt-cli
   - travis_retry npm install
-  - travis_retry gem install --no-document "jekyll:~>3.0.0" "rouge:~>1.10" "sass:~>3.4"
+  - travis_retry gem install --no-document "jekyll:~>3.0" "rouge:~>1.10" "sass:~>3.4"
 
 matrix:
   fast_finish: true