.travis.yml in prawn-rtl-support-0.1.5 vs .travis.yml in prawn-rtl-support-0.1.6

@@ -1,5 +1,7 @@
-sudo: false
 language: ruby
 rvm:
-  - 2.3.1
-before_install: gem install bundler -v 1.14.5
+  - 2.6
+  - 2.5
+  - 2.4
+before_install:
+  - gem install bundler