.travis.yml in lens_protocol-0.2.0 vs .travis.yml in lens_protocol-0.2.1

@@ -1,5 +1,5 @@
 ---
 sudo: false
 language: ruby
 cache: bundler
-before_install: gem install bundler -v 2.0.2
+before_install: gem install bundler -v 2.1.4