Drop < 2.3.0 ruby support in Travis

UberMouse · web-flow · commit be9258f23116 · 2019-01-07T09:29:47.000+13:00
Bundler no longer supports these platforms
diff --git a/.travis.yml b/.travis.yml
@@ -5,8 +5,6 @@ script:
   - bundle exec rake
 
 rvm:
- - 2.0.0
- - 2.2.5
  - 2.3.3
  - 2.4.0
 

-Original file line number
+Diff line change
   - bundle exec rake
 rvm:
 - - 2.0.0
 - - 2.2.5
  - 2.3.3
  - 2.4.0