draft function name clash

[akaliazin]

'draft' function is defined in the lib/composure.bash

Unfortunately the name of this function is clashing with the draft binary Draft actively developed for the K8S domain.
Simply renaming 'draft' function here to say 'draft_fun' would do.

ref: originally raised as #1453 for Bash-It

[erichs]

That conflict is unfortunate, but the keyword draft is pretty central to my metaphor :) I guess I'm inclined to keep it.