unable to load without optional packages (msf)

Hello,

I have installed all required deps, however beef failed to load.
First, it is "msgpack" (which is tricky), the second is xmlrpc, may be others. The error is the following:
```
bash$ beef
bundler: failed to load command: /usr/lib/beef/beef (/usr/lib/beef/beef)
LoadError: cannot load such file -- xmlrpc/client
/usr/lib64/beef/core/loader.rb:22:in `require'
/usr/lib64/beef/core/loader.rb:22:in `'
/usr/lib/beef/beef:44:in `require'
/usr/lib/beef/beef:44:in `'
```

Could you sync the list of deps with core/loader.rb?

Start by reading core/loader.rb and comparing its required packages with the project's declared dependency list. Reproduce the beef startup failure, then verify that all packages loaded by the loader are declared and that beef starts without manually installed optional packages.

Written by the indexing model from the issue text.