Update SourceKitten to 0.24

[jpsim]

Released here: https://github.com/jpsim/SourceKitten/releases/tag/0.24.0

Fixes #2812

[SwiftLintBot]

	12 Messages
📖	Linting Aerial with this PR took 2.89s vs 2.75s on master (5% slower)
📖	Linting Alamofire with this PR took 5.54s vs 5.37s on master (3% slower)
📖	Linting Firefox with this PR took 14.14s vs 13.7s on master (3% slower)
📖	Linting Kickstarter with this PR took 24.98s vs 24.29s on master (2% slower)
📖	Linting Moya with this PR took 2.65s vs 2.71s on master (2% faster)
📖	Linting Nimble with this PR took 2.28s vs 2.25s on master (1% slower)
📖	Linting Quick with this PR took 0.84s vs 0.83s on master (1% slower)
📖	Linting Realm with this PR took 3.94s vs 3.96s on master (0% faster)
📖	Linting SourceKitten with this PR took 1.54s vs 1.56s on master (1% faster)
📖	Linting Sourcery with this PR took 4.83s vs 4.89s on master (1% faster)
📖	Linting Swift with this PR took 37.52s vs 37.59s on master (0% faster)
📖	Linting WordPress with this PR took 30.99s vs 31.08s on master (0% faster)

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