Resolve Swift 5 Warnings

[kwridan]

Part of #316

Short description 📝

A few warnings are displayed when building Tuist with Swift 5. Most of the warnings are generated by the SwiftPM dependency.

e.g.

.build/checkouts/swift-package-manager-7533872658195579349/Sources/Basic/ByteString.swift:95:16: warning: 'Hashable.hashValue' is deprecated as a protocol requirement; conform type 'ByteString' to 'Hashable' by implementing 'hash(into:)' instead
    public var hashValue: Int {

Solution 📦

Update the revision the Swift PM dependency points to one that has been updated for Swift 5.

Implementation 👩‍💻👨‍💻

• Update asString to pathString
• Update import Utility to SPMUtility
• Fix any remaining warnings

Test Plan 🛠

• Verify unit tests pass swift test
• Verify acceptance tests pass bundle exec rake features

[tuistbot]

	2 Warnings
⚠️	Please include a CHANGELOG entry. You can find it at CHANGELOG.md.
⚠️	Have you introduced any user-facing changes? If so, please take some time to update the documentation. Keeping the documentation up to date makes it easier for users to learn how to use Tuist.

Generated by 🚫 Danger

[codecov]

Codecov Report

Merging #325 into master will decrease coverage by <.01%.
The diff coverage is 93.54%.

@@            Coverage Diff             @@
##           master     #325      +/-   ##
==========================================
- Coverage   89.32%   89.31%   -0.01%     
==========================================
  Files         277      278       +1     
  Lines       12163    12172       +9     
==========================================
+ Hits        10864    10872       +8     
- Misses       1299     1300       +1

Impacted Files	Coverage Δ
...istKitTests/Commands/CreateIssueCommandTests.swift	100% <ø> (ø)	⬆️
...uistEnvKitTests/Commands/InstallCommandTests.swift	100% <ø> (ø)	⬆️
Sources/TuistEnvKit/Commands/InstallCommand.swift	81.48% <ø> (ø)	⬆️
Sources/TuistKit/Commands/DumpCommand.swift	75% <ø> (ø)	⬆️
Sources/TuistKit/Commands/VersionCommand.swift	0% <ø> (ø)	⬆️
...tTests/Versions/Mocks/MockVersionsController.swift	95.45% <ø> (ø)	⬆️
Sources/TuistEnvKit/GitHub/GitHubClient.swift	43.13% <ø> (ø)	⬆️
.../TuistCoreTesting/Commands/MockHiddenCommand.swift	0% <ø> (ø)	⬆️
...sts/TuistKitTests/Commands/FocusCommandTests.swift	100% <ø> (ø)	⬆️
Sources/TuistKit/Commands/UpCommand.swift	75% <ø> (ø)	⬆️
... and 96 more

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