.travis.yml in jbuilder-2.9.0 vs .travis.yml in jbuilder-2.9.1

@@ -18,10 +18,11 @@
 gemfile:
   - gemfiles/rails_4_2.gemfile
   - gemfiles/rails_5_0.gemfile
   - gemfiles/rails_5_1.gemfile
   - gemfiles/rails_5_2.gemfile
+  - gemfiles/rails_6_0.gemfile
   - gemfiles/rails_head.gemfile
 
 matrix:
   include:
     - rvm: 1.9
@@ -41,9 +42,15 @@
       gemfile: gemfiles/rails_4_2.gemfile
     - rvm: 2.5.5
       gemfile: gemfiles/rails_4_2.gemfile
     - rvm: 2.6.2
       gemfile: gemfiles/rails_4_2.gemfile
+    - rvm: 2.2.10
+      gemfile: gemfiles/rails_6_0.gemfile
+    - rvm: 2.3.8
+      gemfile: gemfiles/rails_6_0.gemfile
+    - rvm: 2.4.6
+      gemfile: gemfiles/rails_6_0.gemfile
     - rvm: 2.2.10
       gemfile: gemfiles/rails_head.gemfile
     - rvm: 2.3.8
       gemfile: gemfiles/rails_head.gemfile
     - rvm: 2.4.6