.travis.yml in onfido-1.0.0 vs .travis.yml in onfido-1.1.0

@@ -1,15 +1,14 @@
 language: ruby
+cache: bundler 
 
 rvm:
+  - 2.2
   - 2.3
   - 2.4
   - 2.5
   - 2.6
-
-before_install:
-    - gem update --system
-    - gem install bundler
+  - 2.7
 
 script:
   - bundle exec rubocop
   - bundle exec rspec spec