Revert "CI: Disable macOS CI"

This reverts commit a7be9bf.

Author: NeedleInAJayStack

.github/workflows/test.yml

@@ -4,16 +4,15 @@ on:
   push: { branches: [ main ] }
 
 jobs:
-  # Disabled because `latest` is only XCode 16.2 which has Swift 6.0.3
-  # macos-test:
-  #   runs-on: macos-latest
-  #   steps:
-  #     - uses: maxim-lobanov/setup-xcode@v1
-  #       with:
-  #         xcode-version: latest
-  #     - uses: actions/checkout@v4
-  #     - name: Darwin build & test
-  #       run: swift test --enable-all-traits --skip IntegrationTests
+  macos-test:
+    runs-on: macos-latest
+    steps:
+      - uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: latest
+      - uses: actions/checkout@v4
+      - name: Darwin build & test
+        run: swift test --enable-all-traits --skip IntegrationTests
   linux-test:
     runs-on: ubuntu-latest
     container: