beef depends on a currently broken module

[fabianfrz]

Environment

What version/revision of BeEF are you using?
master

On what version of Ruby?

ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-linux]

On what browser?
none

On what operating system?
Arch linux

Configuration

Are you using a non-default configuration?

Have you enabled or disabled any BeEF extensions?

Summary

dependency uglifier cannot be loaded and therefor beef breaks:
reported upstream to lautis/uglifier#121

Expected Behaviour

beef may start without it or another gem may be used until `uglifier` is fixed

Actual Behaviour

What was the actual result?

does not start

Steps to Reproduce

Please provide steps to reproduce this issue.

./beef

Additional Information

uglifier (3.2.0) is in the gemfile.lock

[fabianfrz]

Answer from upstream: Gemfile needs to be updated to use at least therubyracer 0.12.3 to be compatible with ruby 2.4