Swift: Bump the swift-dependencies group with 2 updates

Bumps the swift-dependencies group with 2 updates: [github.com/swiftpackageindex/spimanifest](https://github.com/SwiftPackageIndex/SPIManifest) and [github.com/pointfreeco/swift-snapshot-testing](https://github.com/pointfreeco/swift-snapshot-testing).

Updates `github.com/swiftpackageindex/spimanifest` from 1.11.0 to 1.12.0
- [Release notes](https://github.com/SwiftPackageIndex/SPIManifest/releases)
- [Commits](SwiftPackageIndex/SPIManifest@1.11.0...1.12.0)

Updates `github.com/pointfreeco/swift-snapshot-testing` from 1.19.1 to 1.19.2
- [Release notes](https://github.com/pointfreeco/swift-snapshot-testing/releases)
- [Commits](pointfreeco/swift-snapshot-testing@1.19.1...1.19.2)

---
updated-dependencies:
- dependency-name: github.com/swiftpackageindex/spimanifest
  dependency-version: 1.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: swift-dependencies
- dependency-name: github.com/pointfreeco/swift-snapshot-testing
  dependency-version: 1.19.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: swift-dependencies
...

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Author: dependabot[bot]