.travis.yml in pseudolocalization-0.5.0 vs .travis.yml in pseudolocalization-0.8.1

@@ -1,5 +1,14 @@
-sudo: false
 language: ruby
 rvm:
-  - 2.4.2
-before_install: gem install bundler -v 1.16.0
+  - 2.4.6
+  - 2.5.5
+  - 2.6.3
+before_install:
+  - gem update --system
+  - gem install bundler -v '1.17.3'
+cache:
+  bundler: true
+install:
+  - bundle install
+script:
+  - bundle exec rake test