.travis.yml in phonetics-1.5.1 vs .travis.yml in phonetics-1.5.2

@@ -1,5 +1,6 @@
 sudo: false
 language: ruby
 rvm:
   - 2.5.1
-before_install: gem install bundler -v 1.16.2
+  - 2.6.3
+before_install: gem install bundler