.travis.yml in nurse-rb-1.0.0 vs .travis.yml in nurse-rb-2.0.0

@@ -1,4 +1,12 @@
 language: ruby
+sudo: false
+cache: bundle
 rvm:
-  - 2.2.2
+  # - 1.9.3
+  - 2.0
+  - 2.1
+  - 2.2
+  - 2.3.0
+  - 2.4.0
+script: rake test:coveralls
 before_install: gem install bundler -v 1.10.6