[Jeehut]

Summary

Picks up #39 by @H4Hugo, rebased onto current main. His commit is kept as-is, so he stays the author in the history.

-platforms: [.macOS(.v13), .iOS(.v16), .tvOS(.v16), .watchOS(.v9), .macCatalyst(.v16)]
+platforms: [.macOS(.v13), .iOS(.v15), .tvOS(.v15), .watchOS(.v9), .macCatalyst(.v15)]

The log APIs and the Duration helpers need Duration, which arrived in iOS 16 and tvOS 16. They get @available(iOS 16, tvOS 16, *). Everything else in ErrorKit works on 15.

The only conflict was in ErrorKit+OSLog.swift: #42 added a comment above the Duration extension. Both the comment and the new annotation stay.

Supersedes #39.

Evidence

• Before: main can't be used by apps that support iOS 15 or tvOS 15.
  After:
  • xcodebuild build succeeds for generic/platform=iOS and generic/platform=tvOS with the lower minimums.
  • xcodebuild build-for-testing succeeds for the iOS Simulator.
  • swift test on macOS passes: 21 tests in 5 suites.

CI only runs swift test on macOS, so the iOS and tvOS builds above are the check for the new minimums.

Merge Danger

Door: two-way

Blast Radius: none

Lowering a minimum can't break existing apps. The log APIs are now unavailable on iOS 15 and tvOS 15, which is where they couldn't work anyway.