Fix macOS 13 compatibility

Remove asyncAndWait which is unavailable on macOS < 14. Using sync instead, which has equivalent behavior.

Author: nekohasekai

Sources/CodeEditSourceEditor/Extensions/DispatchQueue+dispatchMainIfNot.swift

@@ -31,7 +31,7 @@ extension DispatchQueue {
         if Thread.isMainThread {
             return item()
         } else {
-            return DispatchQueue.main.asyncAndWait(execute: item)
+            return DispatchQueue.main.sync(execute: item)
         }
     }
 }