Mark JRuby 9.1.9.0 or later as a Ripper supported environment

* https://travis-ci.org/rspec/rspec-support/jobs/262898547
* jruby/jruby#4562

Author: yujinakayama

lib/rspec/support/ruby_features.rb

@@ -80,9 +80,9 @@ def supports_exception_cause?
 
       if Ruby.jruby?
         ripper_requirements.push(Ruby.jruby_version >= '1.7.5')
-        # Ripper on JRuby 9.0.0.0.rc1 or later reports wrong line number
+        # Ripper on JRuby 9.0.0.0.rc1 - 9.1.8.0 reports wrong line number
         # or cannot parse source including `:if`.
-        ripper_requirements.push(Ruby.jruby_version < '9.0.0.0.rc1')
+        ripper_requirements.push(!Ruby.jruby_version.between?('9.0.0.0.rc1', '9.1.8.0'))
       end
 
       if ripper_requirements.all?