.travis.yml in counter_culture-2.2.4 vs .travis.yml in counter_culture-2.3.0

@@ -4,13 +4,13 @@
   - mysql
 addons:
   postgresql: "9.6"
 rvm:
   - "2.3.8"
-  - "2.4.6"
-  - "2.5.5"
-  - "2.6.3"
+  - "2.4.7"
+  - "2.5.6"
+  - "2.6.4"
 gemfile:
   - gemfiles/rails_4.2.gemfile
   - gemfiles/rails_5.0.gemfile
   - gemfiles/rails_5.1.gemfile
   - gemfiles/rails_5.2.gemfile
@@ -21,10 +21,10 @@
   - DB=mysql2
 matrix:
   exclude:
     - rvm: "2.3.8"
       gemfile: gemfiles/rails_6.0.gemfile
-    - rvm: "2.4.6"
+    - rvm: "2.4.7"
       gemfile: gemfiles/rails_6.0.gemfile
 before_install:
   - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
   - gem install bundler -v '< 2'
 install: