.travis.yml in lita-zerocater-0.10.0 vs .travis.yml in lita-zerocater-1.0.0

@@ -1,8 +1,8 @@
 language: ruby
 rvm:
-  - 2.1
-  - 2.2
+  - 2.3
+  - 2.4
 services:
   - redis-server
 cache: bundler
 sudo: false