Update Ruby versions 2.4 to 2.7 on Travis

jcoglan · jcoglan · commit 96059802a664 · 2020-05-14T17:20:12.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -8,9 +8,10 @@ rvm:
   - 2.1.10
   - 2.2.10
   - 2.3.8
-  - 2.4.6
-  - 2.5.5
-  - 2.6.3
+  - 2.4.10
+  - 2.5.8
+  - 2.6.6
+  - 2.7.1
   - jruby-19mode
   - jruby-head
 
