CI: Update travis Ruby versions (#871)

Ruby 2.7.0 is out as of 2019-12-15.
drapergem · Jan 10, 2020 · e31a54e · e31a54e
1 parent 6a3bf0d
commit e31a54e
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -13,6 +13,7 @@ rvm:
   - 2.4.9
   - 2.5.7
   - 2.6.5
+  - 2.7.0
   - ruby-head
 
 matrix: