.travis.yml in aba-0.4.0 vs .travis.yml in aba-0.5.0

@@ -1,7 +1,6 @@
 language: ruby
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1.7
-  - 2.2.3
+  - 2.5.8
+  - 2.6.6
+  - 2.7.1
 script: bundle exec rspec spec