Use newer (9.2.0.0) version of JRuby in Travis CI

Author: AlexWayfer

.travis.yml

@@ -17,7 +17,7 @@ env: JRUBY_OPTS="$JRUBY_OPTS --debug"
 
 rvm:
   # Include JRuby first because it takes the longest
-  - jruby-9.1.13.0
+  - jruby-9.2.0.0
   - 2.2
   - 2.3.4
   - 2.4.1