解決 invalid 'depends_on macos'

問題：

~ brew cask uninstall macdown
Error: Cask 'macdown' definition is invalid: invalid 'depends_on macos' value: ":mountain_lion"

解決：

/usr/bin/find "$(brew --prefix)/Caskroom/"*'/.metadata' -type f -name '*.rb' -print0 | /usr/bin/xargs -0 /usr/bin/perl -i -pe 's/depends_on macos: \[.*?\]//gsm;s/depends_on macos: .*//g'

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參考：https://github.com/Homebrew/homebrew-cask/issues/58046