.travis.yml in null-logger-0.1.4 vs .travis.yml in null-logger-0.1.5

@@ -1,11 +1,18 @@
 language: ruby
+sudo: false
 rvm:
-  - 2.2.3
   - 2.3.0
   - 2.3.1
   - 2.3.2
   - 2.3.3
+  - 2.3.4
   - 2.4.0
   - 2.4.1
-script:
-  - bundle exec rake
+  - 2.4.2
+  - 2.5.0
+  - jruby-head
+script: bundle exec rspec spec/
+env:
+  global:
+    - JRUBY_OPTS='--debug'
+install: bundle install --jobs=3 --retry=3