.travis.yml in byebug-3.5.1 vs .travis.yml in byebug-4.0.0

@@ -1,11 +1,31 @@
-before_script: bundle exec rake compile
+os:
+- linux
+- osx
+
+language: ruby
+
+install:
+- if [ "$TRAVIS_OS_NAME" == "linux" ]; then sudo apt-get install indent; fi
+- bundle install --jobs=3 --retry=3
+
+script:
+- if [ "$TRAVIS_OS_NAME" == "linux" ]; then bundle exec rake ; fi
+- if [ "$TRAVIS_OS_NAME" == "osx" ]; then bundle exec rake compile test ; fi
+
 rvm:
 - 2.0.0
 - 2.1
+- 2.2.1
 - ruby-head
+
+env:
+- CC=gcc
+- CC=clang
+
 matrix:
   allow_failures:
   - rvm: ruby-head
+
 addons:
   code_climate:
     repo_token: 02530029b1e956220f05076c590b84b9ab078362c9083312eb2ad41cab138408