Add support for finding libmagic install by brew on Apple Silicon #24
Description
From https://github.com/Homebrew/brew/blob/master/docs/Installation.md#installation
This script installs Homebrew to its preferred prefix (/usr/local for macOS Intel, /opt/homebrew for Apple Silicon and /home/linuxbrew/.linuxbrew for Linux)
We only need to add a glob after https://github.com/nexB/typecode/blob/main/src/typecode/magic2.py#L128
glob.glob('/opt/homebrew/Cellar/libmagic/*/lib/libmagic.dylib')