.travis.yml in multihashes-0.1.3 vs .travis.yml in multihashes-0.2.0

@@ -1,4 +1,6 @@
+---
 language: ruby
+cache: bundler
 rvm:
-  - 2.1.2
-before_install: gem install bundler -v 1.10.2
+  - 2.6.3
+before_install: gem install bundler -v 2.0.1