Move bundler up and do not specify version

Author: thebadmonkeydev

.travis.yml

@@ -3,10 +3,10 @@ language: ruby
 rvm:
   - 2.5.0
 before_script:
+  - gem install bundler
   - curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
   - chmod +x ./cc-test-reporter
   - ./cc-test-reporter before-build
-  - gem install bundler -v 1.16.1
 script: bundle exec rspec
 after_script:
   - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT