swiftlint: update to 0.57.0

[herbygillot]

Verification

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[macportsbot]

Notifying maintainers:
@csknns for port swiftlint.

[markemer]

error: 'swiftlint-0.57.0': package 'swiftlint-0.57.0' is using Swift tools version 5.9.0 but the installed version is 5.7.1

So this is just always gonna fail if Xcode < 15, so we need to add that to the Portfile. If you're using Swiftlint but don't have swift n or n-1, I'm not sure what exactly you're doing.

[reneeotten]

@markemer I don't need to review this PR anyore; @herbygillot can merge/commit this himself whenever he feels it's ready.