generate/submit CASK for HomeBrew

[xerc]

https://github.com/Homebrew/homebrew-cask/blob/master/CONTRIBUTING.md#getting-set-up-to-contribute
https://github.com/Homebrew/homebrew-cask/blob/master/doc/development/adding_a_cask.md#adding-a-cask
https://github.com/Homebrew/homebrew-cask/tree/master/doc/cask_language_reference

cask "bigsurblocker" do
  version "20201111"
  if MacOS.version >= :sierra
    sha256 "80e40d96309332abd1c8b58f826a68f5f680fc88f1ce5b31dd580b631d07c43e"
    url "https://github.com/hjuutilainen/bigsurblocker/releases/download/v#{version}/bigsurblocker-#{version}.pkg"
  else
    sha256 "c8cd0b26f3ed4f1f0feb17abf59da80d4ab8e19d651cf886fc2cd7f14203d320"
    url "https://github.com/hjuutilainen/bigsurblocker/releases/download/v#{version}/bigsurblocker-#{version}-unsigned.pkg"
  end

  auto_updates false
  depends_on macos: ">= 10.9"

  name "Big Sur Blocker"
  desc "Block <macOS Big Sur.app> (and display an alert)"
  homepage "https://github.com/hjuutilainen/bigsurblocker"

  [..]
end