.travis.yml in scenic-1.3.0 vs .travis.yml in scenic-1.4.0

- old
+ new
@@ -15,17 +15,30 @@
 notifications:
   email:
     - false
 sudo: false
 rvm:
-  - 2.3.0
-  - 2.2.4
+  - 2.4.1
+  - 2.3.4
+  - 2.2.7
   - 2.1.8
 gemfile:
   - gemfiles/rails40.gemfile
   - gemfiles/rails41.gemfile
   - gemfiles/rails42.gemfile
   - gemfiles/rails50.gemfile
+  - gemfiles/rails51.gemfile
+  - gemfiles/rails_edge.gemfile
 matrix:
   exclude:
+    - rvm: 2.4.1
+      gemfile: gemfiles/rails40.gemfile
+    - rvm: 2.4.1
+      gemfile: gemfiles/rails41.gemfile
     - rvm: 2.1.8
       gemfile: gemfiles/rails50.gemfile
+    - rvm: 2.1.8
+      gemfile: gemfiles/rails51.gemfile
+    - rvm: 2.1.8
+      gemfile: gemfiles/rails_edge.gemfile
+  allow_failures:
+    - gemfile: gemfiles/rails_edge.gemfile