.travis.yml in danger-slim_lint-0.1.1 vs .travis.yml in danger-slim_lint-0.1.2

@@ -6,13 +6,13 @@
 cache:
   directories:
     - bundle
 
 rvm:
-  - 2.2.9
-  - 2.3.6
-  - 2.4.3
-  - 2.5.0
+  - 2.3.8
+  - 2.4.5
+  - 2.5.3
+  - 2.6.1
   - ruby-head
 
 before_install:
   - gem update bundler