Update Xcode 15.0.0

Author: nnsnodnb

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: macos-13
     name: Action Tests (Swift 5.0)
     env:
-      DEVELOPER_DIR: /Applications/Xcode_14.3.1.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_15.0.0.app/Contents/Developer
     steps:
       - uses: actions/checkout@v4
       - name: Cache Carthage

Action.xcodeproj/project.pbxproj

@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 52;
+	objectVersion = 54;
 	objects = {
 
 /* Begin PBXBuildFile section */