.travis.yml in capybara-screenshot-diff-0.1.0 vs .travis.yml in capybara-screenshot-diff-0.2.1

@@ -1,10 +1,16 @@
 language: ruby
 rvm:
-  - jruby-9.0.4.0
-  - jruby-9.0.5.0
   - jruby-head
+  - jruby-9.1.2.0
+  - jruby-9.1.5.0
+  - 2.3.1
+  - 2.2.5
   - 2.1.8
-  - 2.2.4
-  - 2.3.0
   - ruby-head
-before_install: gem install bundler -v 1.11.2
+before_install: gem query -i -n ^bundler$ >/dev/null || gem install bundler
+
+env:
+  - JRUBY_OPTS="--dev --debug"
+
+jdk:
+  - oraclejdk8