chore(ci): Add Ruby 2.6, drop Ruby 2.3

DirtyF · web-flow · commit a77e4341d0f3 · 2019-01-06T20:07:20.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,7 @@
 language: ruby
 rvm:
-  - 2.3
   - 2.4
-  - 2.5
+  - 2.6
 sudo: false
 cache: bundler
 before_script: bundle update
