Add new brew install method on README.md

[hafizhanindito]

Add new info for installing with brew, please see: Homebrew/discussions#340 (comment)

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ hafizhanindito
❌ overtake
_{You have signed the CLA already but the status is still pending? Let us recheck it.}