.travis.yml in permalink-2.0.0 vs .travis.yml in permalink-2.1.0

@@ -1,8 +1,7 @@
 cache: bundler
 sudo: false
 rvm:
-  - '2.0'
-  - '2.1'
-  - '2.3.0'
+  - "2.7.1"
+  - "2.6.5"
 notifications:
   email: false