Update dependency swiftlang/swift-syntax to v603

[renovate]

This PR contains the following updates:

Package	Update	Change
swiftlang/swift-syntax	major	from: "602.0.0" → from: "603.0.1"

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Release Notes

swiftlang/swift-syntax (swiftlang/swift-syntax)

v603.0.1

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What's Changed

• Add explicit target dependency by @​SimplyDanny in #​3307

Full Changelog: swiftlang/swift-syntax@603.0.0...603.0.1

v603.0.0

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New APIs

• SwiftIfConfig.StaticBuildConfiguration a data structure for a build configuration.

  • Description: This describes all of the aspects of a build configuration that are needed for #if evaluation. It is Codable so that it can be stored and replayed later.
  • Pull Request: #​3154

• MacroExpansionContext.buildConfiguration

  • Description: MacroExpansionContext now has buildConfiguration property describing the build configuration that will be used with the generated source code.
  • Pull Request: #​3154

API Behavior Changes

Deprecations

API-Incompatible Changes

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