Enable more jrubies in CI

Author: arnoFleming

.travis.yml

@@ -5,12 +5,16 @@ rvm:
 - 2.4
 - 2.5
 - 2.6
-- jruby-9.0
+- jruby-9.0.5
+- jruby-9.1.6
+- jruby-9.2.0
 before_install: echo Y | rvm @global do gem uninstall bundler ; gem install bundler -v 1.16.1
 cache: bundler
 matrix:
   allow_failures:
-    - rvm: jruby-9.0
+    - rvm: jruby-9.0.5
+    - rvm: jruby-9.1.6
+    - rvm: jruby-9.2.0
 script:
   - RUBYOPT="--enable-frozen-string-literal" bundle exec rspec
   - bundle exec rubocop -c .rubocop.yml --force-exclusion