.travis.yml in hanko-0.1.5 vs .travis.yml in hanko-0.1.6

@@ -4,18 +4,33 @@
 before_script:
   - bundle update
 cache: bundler
 rvm:
   - 2.0.0
-  - 2.1.8
-  - 2.2.4
-  - 2.3.0
-  - ruby-head
-before_install: gem install bundler -v 1.10.6
+  - 2.1.10
+  - 2.2.6
+  - 2.3.3
+  - 2.4.0-preview3
 gemfile:
   - gemfiles/rails3.gemfile
   - gemfiles/rails40.gemfile
   - gemfiles/rails41.gemfile
   - gemfiles/rails42.gemfile
-notifications:
-  emails:
-    - [e-mail]
+  - gemfiles/rails50.gemfile
+matrix:
+  exclude:
+    - rvm: 2.0.0
+      gemfile: gemfiles/rails50.gemfile
+    - rvm: 2.1.10
+      gemfile: gemfiles/rails50.gemfile
+    - rvm: 2.3.3
+      gemfile: gemfiles/rails40.gemfile
+    - rvm: 2.3.3
+      gemfile: gemfiles/rails3.gemfile
+    - rvm: 2.4.0-preview3
+      gemfile: gemfiles/rails40.gemfile
+    - rvm: 2.4.0-preview3
+      gemfile: gemfiles/rails3.gemfile
+  allow_failures:
+    - rvm: 2.4.0-preview3
+  fast_finish: true
+bundler_args: --jobs 3 --retry 3