.travis.yml in ianfleeton-paypal-express-0.8.5 vs .travis.yml in ianfleeton-paypal-express-0.8.6

@@ -1,11 +1,10 @@
 before_install:
   - gem install bundler
 
 rvm:
-  - 2.4.6
-  - 2.5.5
-  - 2.6.3
+  - 2.5.6
+  - 2.6.4
 
 env:
-  - RAILS_VERSION="~> 4.2"
   - RAILS_VERSION="~> 5.0"
+  - RAILS_VERSION="~> 6.0"