bump ruby versions

Fivell · web-flow · commit 4f2aadcf6791 · 2020-02-06T10:50:48.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,6 +4,7 @@ env:
     - RAILS=5.1.6.2
     - RAILS=5.2.2.1
 rvm:
-  - 2.3.8
   - 2.4.5
   - 2.5.5
+  - 2.6.5
+  - 2.7.0
