Bump SourceKitten dependency to 0.23.2

[jpsim]

Which adds Equatable and Hashable conformance to File.

[SwiftLintBot]

	1 Warning
⚠️	Please include a CHANGELOG entry to credit yourself! You can find it at CHANGELOG.md.

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* Bump SourceKitten dependency to 0.23.2.  
  [jpsim](https://github.com/jpsim)
  [#issue_number](https://github.com/realm/SwiftLint/issues/issue_number)

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