.travis.yml in progressrus-1.0.1 vs .travis.yml in progressrus-1.0.2

@@ -1,7 +1,8 @@
 language: ruby
 services:
   - redis-server
 rvm:
-  - 2.3
   - 2.4
   - 2.5
+  - 2.6
+  - 2.7