.travis.yml in r10k-2.6.9 vs .travis.yml in r10k-3.0.0

@@ -3,22 +3,15 @@
 bundler_args: "--without system"
 script: "bundle exec rspec --color --format documentation spec/unit"
 notifications:
   email: false
 sudo: false
+before_install: gem update bundler
+rvm:
+  - "2.4.0"
+  - "2.3.0"
+  - "2.2.4"
+  - "2.1.8"
+  - "2.0.0"
+  - "jruby-19mode"
 jdk:
-  - openjdk8
-before_install: gem install bundler -v '< 2' --no-document
-matrix:
-  include:
-    - stage: r10k tests
-      rvm: 2.3.0
-    - stage: r10k tests
-      rvm: 2.2.0
-    - stage: r10k tests
-      rvm: 2.1.0
-    - stage: r10k tests
-      rvm: 2.0.0
-    - stage: r10k tests
-      rvm: 1.9.3
-    - stage: r10k tests
-      rvm: jruby-19mode
+    - oraclejdk8