Support Adding Teams to repos

[ajinkya]

Support the functionality to add teams to repos as well.
Some thing like this:
gh repo-collab add <repo> {--user <username>|--team <teamname>} [--permission <string>]

[ajinkya]

Will take a stab at adding this over the weekend.

[timbarton1966]

Any luck?

[genisd]

Just came here looking for the same.