.travis.yml in infoblox-2.0.5 vs .travis.yml in infoblox-3.0.0

@@ -1,11 +1,18 @@
 language: ruby
 rvm:
-  - 2.4.0
-  - 2.3.3
-  - 2.2.6
+  - 2.6.3
+  - 2.5.5
+  - 2.4.6
+  - 2.3.8
+  - 2.2.10
   - 2.1.10
   - 1.9.3
-  - jruby-19mode
-  - 1.8.7
-before_install: gem install bundler
+  - jruby-9.2.7.0
+# https://docs.travis-ci.com/user/languages/ruby/
+# https://bundler.io/blog/2019/01/04/an-update-on-the-bundler-2-release.html
+before_install:
+  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
+  - gem uninstall bundler -v '>= 2' || true
+  - gem install bundler -v '< 2'
+  - gem list | grep bundler
 script: bundle exec rspec