.travis.yml in kramdown-man-0.1.6 vs .travis.yml in kramdown-man-0.1.7

@@ -1,9 +1,11 @@
+---
+before_install:
+  - gem update --system
+  - gem install bundler -v "~> 2.0"
 language: ruby
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1.0
-  - 2.2.0
+  - 2.5
+  - 2.6
+  - 2.7
   - jruby
-  - rbx-2
 script: bundle exec rake spec