.travis.yml in doomfire-0.3.1 vs .travis.yml in doomfire-0.3.2

@@ -1,10 +1,10 @@
 ---
 sudo: false
 language: ruby
 cache: bundler
 rvm:
-  - 2.3.8
-  - 2.4.5
-  - 2.5.5
-  - 2.6.2
-before_install: gem install bundler -v 2.0.1
+  - 2.4.9
+  - 2.5.7
+  - 2.6.5
+  - 2.7.0
+before_install: gem install bundler -v 2.1.2