chore(ci): test oldest and latest Ruby versions

DirtyF · DirtyF · commit 8b78b4162e27 · 2018-12-06T11:26:06.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -8,7 +8,6 @@ branches:
     - master
 rvm:
   - 2.5
-  - 2.4
   - 2.3
 env:
   - ""

-Original file line number
+Diff line change
     - master
 rvm:
   - 2.5
 -  - 2.4
   - 2.3
 env:
   - ""