.travis.yml in clockwork-2.0.4 vs .travis.yml in clockwork-3.0.0

@@ -7,12 +7,24 @@
   # https://docs.travis-ci.com/user/languages/ruby/#bundler-20
   - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
   - gem install bundler -v '< 2'
 rvm:
   - 2.3.8
-  - 2.4.5
-  - 2.5.3
+  - 2.4.9
+  - 2.5.7
+  - 2.6.5
+  - 2.7.0
+  - 3.0.2
   - jruby-9.1.17.0
-  - jruby-9.2.6.0
+  - jruby-9.2.11.0
 gemfile:
   - gemfiles/activesupport4.gemfile
   - gemfiles/activesupport5.gemfile
+  - gemfiles/activesupport6.gemfile
+matrix:
+  exclude:
+    - rvm: 2.3.8
+      gemfile: gemfiles/activesupport6.gemfile
+    - rvm: 2.4.9
+      gemfile: gemfiles/activesupport6.gemfile
+    - rvm: jruby-9.1.17.0
+      gemfile: gemfiles/activesupport6.gemfile