.travis.yml in appium_lib-9.8.2 vs .travis.yml in appium_lib-9.8.3

@@ -3,11 +3,14 @@
 language: ruby
 rvm:
   - 2.2.5
   - 2.3.3
   - 2.4.0
+  - 2.5.0
 
-before_install: gem update --remote bundler
+before_install:
+  - gem update --system
+  - gem update bundler
 install:
   - bundle install --retry=3
 script:
   - bundle exec rake rubocop
 notifications: