Recognize new releases of JRuby

[olleolleolle]

There are quite a few new JRuby releases.

Here are the RUBY_VERSION constants for each:

$ rvm jruby-9.1.10.0 do ruby -e 'puts RUBY_VERSION'
2.3.3

$ rvm jruby-9.1.12.0 do ruby -e 'puts RUBY_VERSION'
2.3.3

$ rvm jruby-9.1.13.0 do ruby -e 'puts RUBY_VERSION'
2.3.3

The current situation is that the tool fails with this message:

[!] There was an error parsing `Gemfile`:
RubyDep Error: Unrecognized JRuby version: "9.1.13.0". Bundler cannot continue.

[olleolleolle]

(PR incoming.)