.travis.yml in regexp-examples-1.3.1 vs .travis.yml in regexp-examples-1.3.2

@@ -1,10 +1,11 @@
 language: ruby
 rvm:
   - 2.0.0
   - 2.1.10
-  - 2.2.6
-  - 2.3.3
+  - 2.2.7
+  - 2.3.4
+  - 2.4.1
   - ruby-head
 matrix:
   allow_failures:
     - rvm: ruby-head