.travis.yml in geoserver-publish-0.2.1 vs .travis.yml in geoserver-publish-0.3.0

@@ -1,5 +1,5 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.4.2
-before_install: gem install bundler -v 1.16.1
+  - 2.6.5
+before_install: gem install bundler