.travis.yml in rspec-tabular-0.2.0 vs .travis.yml in rspec-tabular-0.3.0

@@ -1,24 +1,36 @@
 language: ruby
 rvm:
-  - 2.1
-  - 2.2
-  - 2.3
-  - 2.4
   - 2.5
+  - 2.6
+  - 2.7
   - ruby-head
+  - jruby
 matrix:
-  allow_failures:
+  exclude:
+    - rvm: jruby
+      os: osx
     - rvm: ruby-head
-    - rvm: 2.4
       os: osx
+  allow_failures:
+    - rvm: ruby-head
+    - rvm: jruby
 os:
   - linux
   - osx
 sudo: false
+cache:
+  bundler: true
 before_script:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-darwin-amd64 > ./cc-test-reporter ; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter ; fi
   - chmod +x ./cc-test-reporter
   - ./cc-test-reporter before-build
 after_script:
   - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT
+
+# HACK: Continue to use bundler <2 because of Ruby v2.2 support. Once the
+# lowest dependency is Ruby v2.3 we can consider upgrading to Bundler 2.x.
+# @see https://docs.travis-ci.com/user/languages/ruby/#bundler-20
+before_install:
+  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
+  - gem install bundler -v '< 2'