.travis.yml in shirinji-rails-0.0.4 vs .travis.yml in shirinji-rails-0.0.5

@@ -1,15 +1,21 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.3.1
   - 2.4.0
   - 2.4.1
   - 2.4.2
   - 2.4.3
   - 2.4.4
+  - 2.4.5
+  - 2.4.6
   - 2.5.0
   - 2.5.1
   - 2.5.2
   - 2.5.3
+  - 2.5.4
+  - 2.5.5
   - 2.6.0
-before_install: gem install bundler -v 1.16.1
+  - 2.6.1
+  - 2.6.2
+  - 2.6.3
+before_install: gem install bundler