lint: Install grep and git via brew on mac for --perl-regexp
lint: Install grep and git via brew on mac for --perl-regexp

Particularly `--with-pcre2` is needed to run `git grep --perl-regexp` in
`test/link/check-doc.py`

peercoin/peercoin,DigitalPandacoin/pandacoin,peercoin/peercoin,DigitalPandacoin/pandacoin,peercoin/peercoin,DigitalPandacoin/pandacoin,peercoin/peercoin,peercoin/peercoin,DigitalPandacoin/pandacoin,peercoin/peercoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin