.travis.yml in fileutils-1.0.2 vs .travis.yml in fileutils-1.1.0

@@ -1,6 +1,13 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.4.2
+  - 2.3.7
+  - 2.4.4
+  - 2.5.1
   - ruby-head
 script: rake test
+matrix:
+  include:
+    - rvm: jruby-9.1.17.0
+      env:
+        - "JRUBY_OPTS='-J-Xmx1024M -X+O'"