.travis.yml in quickery-0.1.0 vs .travis.yml in quickery-0.1.1

@@ -1,9 +1,10 @@
 sudo: false
 language: ruby
 rvm:
+  - 2.2.7
+  - 2.3.4
+  - 2.4.1
   - 2.5.1
+cache: bundler
 before_install:
   - gem install bundler -v 1.16.1
-  - bundle exec appraisal install
-script:
-  - bundle exec appraisal rake