.travis.yml in jbuilder-2.6.2 vs .travis.yml in jbuilder-2.6.3

- old
+ new
@@ -20,27 +20,38 @@
   - gemfiles/rails_3_2.gemfile
   - gemfiles/rails_4_0.gemfile
   - gemfiles/rails_4_1.gemfile
   - gemfiles/rails_4_2.gemfile
   - gemfiles/rails_5_0.gemfile
+  - gemfiles/rails_5_1.gemfile
 
 matrix:
   allow_failures:
     - rvm: jruby-19mode
     - rvm: rbx
     - rvm: ruby-head
   fast_finish: true
   exclude:
     - rvm: 1.9
       gemfile: gemfiles/rails_5_0.gemfile
+    - rvm: 1.9
+      gemfile: gemfiles/rails_5_1.gemfile
     - rvm: 2.0
       gemfile: gemfiles/rails_5_0.gemfile
+    - rvm: 2.0
+      gemfile: gemfiles/rails_5_1.gemfile
     - rvm: 2.1
       gemfile: gemfiles/rails_5_0.gemfile
+    - rvm: 2.1
+      gemfile: gemfiles/rails_5_1.gemfile
     - rvm: jruby-19mode
       gemfile: gemfiles/rails_5_0.gemfile
+    - rvm: jruby-19mode
+      gemfile: gemfiles/rails_5_1.gemfile
     - rvm: rbx
       gemfile: gemfiles/rails_5_0.gemfile
+    - rvm: rbx
+      gemfile: gemfiles/rails_5_1.gemfile
     - rvm: 2.4.0
       gemfile: gemfiles/rails_3_0.gemfile
     - rvm: 2.4.0
       gemfile: gemfiles/rails_3_1.gemfile
     - rvm: 2.4.0