I do not like that `brew bump` command checks every single formula/cask,
even ones updated by BrewTestBot. Instead of showing useful info about
outdated packages, my terminal buffer is fludded with `Formula is
autobumped so will have bump PRs opened by BrewTestBot every ~3 hours`.
This flag excludes autobumped packages before checking them.
Signed-off-by: botantony <antonsm21@gmail.com>