.travis.yml in saviour-0.6.6 vs .travis.yml in saviour-0.6.7

@@ -1,10 +1,11 @@
 language: ruby
 sudo: false
 cache: bundler
 rvm:
-  - 2.5.0
-  - 2.6.0
+  - 2.5.8
+  - 2.6.6
+  - 2.7.1
 
 gemfile:
   - gemfiles/5.1.gemfile
   - gemfiles/5.2.gemfile
   - gemfiles/6.0.gemfile