.travis.yml in breezy_pdf_lite-0.0.4 vs .travis.yml in breezy_pdf_lite-0.0.6

@@ -1,5 +1,9 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.4.2
+  - 2.7
+  - 2.6
+  - 2.5
+  - jruby
 before_install: gem install bundler
+install: bundle install --jobs=3 --retry=3