.travis.yml in salesforce_chunker-1.1.1 vs .travis.yml in salesforce_chunker-1.2.0

@@ -1,5 +1,5 @@
 sudo: false
 language: ruby
 rvm:
   - 2.5.0
-before_install: gem install bundler -v 1.17.1
+before_install: gem install bundler -v 1.17.3