mightymike: update homepage, rename to mighty-mike

[EricFromCanada]

This set of game ports now has its own site. Also trims an unnecessary zap path and renames the cask to match the app package name.

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• [x] The submission is for a stable version or documented exception.
• [x] brew audit --cask --online <cask> is error-free.
• [x] brew style --fix <cask> reports no offenses.

[bevanjkay]

@EricFromCanada We tend to avoid changing tokens once a cask is already established, as unlike homebrew-core we do not have a way to alias the old token to the new.

This instance potentially could be okay as the cask is not super popular, so I'm interested to hear your thoughts here.

mightymike
30 days: n/a
90 days: 2 (#6718)
365 days: 20 (#5510)
Age: 280 days (added 2021, October 23)