Repo filtering functionality should add glob support

[ljharb]

See #9 (comment)

tldr is that folks who have to manage lots of repos often want to target more than one at a time without having to manually list out each repo. For example:

• org/*
• org/prefix-*
• org/*-suffix
• */forked-name
• */* (or *)

(Also, glob negations - a ! at the front of any glob)

Folks who don't need this functionality simply won't provide an asterisk or a leading bang, and folks who do will have it intuitively work just like gitignore, npmignore, eslint overrides, etc.