.travis.yml in g5_authentication_client-1.0.0.pre.3 vs .travis.yml in g5_authentication_client-1.0.0.pre.4

@@ -1,9 +1,13 @@
 language: ruby
 rvm:
   - 2.2.7
   - 2.3.4
   - 2.4.1
+dist: trusty
+sudo: false
+cache:
+  bundler: true
 script:
   - bundle exec rspec spec
 after_script:
   - bundle exec codeclimate-test-reporter
 addons: