.travis.yml in rollbar-shoryuken-0.1.2 vs .travis.yml in rollbar-shoryuken-1.0.0

@@ -1,4 +1,9 @@
 language: ruby
+
 rvm:
-  - 2.1.4
-before_install: gem install bundler -v 1.11.2
+  - 2.6.3
+  - 2.5.5
+  - 2.4.6
+  - 2.3.8
+
+before_install: gem install bundler -v 1.17.1