[FR]Parameters delimiter to pass options to underlying brew command

[yurikoles]

As another approach to solve the problem raised in #183, what about introducing parameters delimiter, e.g. brew cu -- -v will pass -v flag to directly to brew backend command and will be ignored by brew cu frontend.

[ondrejfuhrer]

Thank you for the suggestion @yurikoles and sorry for late response. I was wondering, if we do that, to which brew commands we should forward these to? To all of those (as there are multiple commands executed) or just the reinstall one? If to all, then what should happen if one of those commands doesn't have that option?