SyntaxError on ruby 2.5

[alee-ccu]

This gem fail to build with following errors:

$ bundle exec rake
rake aborted!
SyntaxError: /home/travis/build/alee-ccu/jquery-ui-rails/Rakefile:34: unmatched range specifier in char-class: /define\(\s*\[\s*([\"\.\/\,\w\s-\:]+)\]/m
/home/travis/.rvm/gems/ruby-2.5.1/gems/rake-12.3.1/exe/rake:27:in `<top (required)>'
/home/travis/.rvm/gems/ruby-2.5.1/bin/ruby_executable_hooks:24:in `eval'
/home/travis/.rvm/gems/ruby-2.5.1/bin/ruby_executable_hooks:24:in `<main>'
(See full trace by running task with --trace)
The command "bundle exec rake" exited with 1.

I reproduced this with travis-ci, see the full log:
https://travis-ci.org/alee-ccu/jquery-ui-rails/jobs/463139146

There is also a bug report on Debian BTS:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=892457

Thanks for this gem.