Merge pull request #857 from ttanimichi/patch-1

CI against Ruby 2.5.0

Author: BookOfGreg

.travis.yml

@@ -7,6 +7,7 @@ cache:
   bundler: true
   yarn: true
 rvm:
+  - 2.5.0
   - 2.3.0
   - 2.1
   - jruby-9.1.9.0
@@ -31,6 +32,14 @@ gemfile:
 matrix:
   fast_finish: true
   exclude:
+    - rvm: 2.5.0
+      gemfile: gemfiles/rails_3.2.gemfile
+    - rvm: 2.5.0
+      gemfile: gemfiles/rails_4.0_with_mini_racer.gemfile
+    - rvm: 2.5.0
+      gemfile: gemfiles/rails_4.0.5.gemfile
+    - rvm: 2.5.0
+      gemfile: gemfiles/rails_4.1.gemfile
     # all except rails_4.1 skipped on 2.1
     - rvm: 2.1
       gemfile: gemfiles/rails_3.2.gemfile
@@ -85,3 +94,4 @@ before_install:
   - echo "deb http://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
   - sudo apt-get update -qq
   - sudo apt-get install -y -qq yarn
+  - gem update --system