Use ruby 2.6 now that 2.5 has been dropped from core

agrare · agrare · commit 72ff01b71e3d · 2021-03-19T08:27:33.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: ruby
 rvm:
-- 2.5.5
+- 2.6.6
 cache:
   directories:
   - vendor/bundle
