livecheck: compare actual version for casks

[SeekingMeaning]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example.
• Have you successfully run brew style with your changes locally?
• Have you successfully run brew typecheck with your changes locally?
• Have you successfully run brew tests with your changes locally?
• Have you successfully run brew man locally and committed any changes?

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Tested with Homebrew/homebrew-cask#98130

Before:

$ brew livecheck --cask adoptopenjdk
adoptopenjdk : 15.0.1,9.1 ==> 15,36

After:

$ brew livecheck --cask adoptopenjdk
adoptopenjdk : 15.0.1,9.1 ==> 15.0.1,9

[BrewTestBot]

Review period will end on 2021-01-19 at 00:00:00 UTC.

[MikeMcQuaid]

What's this do?

[SeekingMeaning]

If we ever change the type of formula_or_cask from

T.any(Formula, Cask::Cask)

to say,

T.any(Formula, Cask::Cask, Thing)

then Sorbet will give an error since we don't handle the case for when formula_or_cask is a Thing

(Admittedly, this is a bit redundant since the name formula_or_cask itself implies that it can only be a Formula or Cask)

Related: https://sorbet.org/docs/exhaustiveness

T.absurd(...) is implemented both statically and at runtime. Statically Sorbet will report an error, and at runtime Sorbet will raise an exception.

[SeekingMeaning]

Should I delete?

[MikeMcQuaid]

I don't feel strongly either way, up to you! Thanks for explaining ❤️

[BrewTestBot]

Review period ended.