.travis.yml in active_fedora-datastreams-0.1.0 vs .travis.yml in active_fedora-datastreams-0.2.0

@@ -1,5 +1,21 @@
 sudo: false
+cache: bundler
 language: ruby
-rvm:
-  - 2.3.1
-before_install: gem install bundler -v 1.12.5
+rvm: 2.4
+matrix:
+  include:
+    - rvm: 2.3
+      env: RAILS_VERSION=4.2.10
+           BUNDLER_VERSION=1.17.3
+    - env: RAILS_VERSION=5.0.7
+    - env: RAILS_VERSION=5.1.6
+    - rvm: 2.5
+    - env: RAILS_VERSION=5.2.1
+    - rvm: 2.6
+global_env:
+  - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
+before_install:
+  - gem update --system
+  - if [ ! -z $BUNDLER_VERSION ]; then gem install bundler -v $BUNDLER_VERSION; else gem install bundler; fi
+before_script:
+  - jdk_switcher use oraclejdk8