.travis.yml in active_admin_datetimepicker-0.6.0 vs .travis.yml in active_admin_datetimepicker-0.6.1

@@ -1,13 +1,13 @@
 script: bundle exec rspec spec
+cache: bundler
 env:
   matrix:
     - RAILS=4.2.6
     - RAILS=5.0.0
 rvm:
   - 2.2.6
   - 2.3.3
 before_install:
   - gem update --system
-  - rvm @global do gem uninstall bundler -a -x
   - rvm @global do gem install bundler -v 1.14.6
   - gem --version
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