.travis.yml in parse-cron-ext-0.1.2 vs .travis.yml in parse-cron-ext-0.2.0

@@ -1,6 +1,12 @@
 ---
 language: ruby
-cache: bundler
+sudo: false
 rvm:
-  - 2.6.8
-before_install: gem install bundler -v 2.1.4
+  - 2.5.9
+  - 2.6.7
+  - 2.7.3
+  - 3.0.1
+before_install:
+  - gem update bundler
+  - gem update --system
+