fix: ignore the error that directoryPath is not a directory

Author: liximomo

lib/DirectoryWatcher.js

@@ -465,7 +465,9 @@ class DirectoryWatcher extends EventEmitter {
 
 	onScanError(err) {
 		if (err) {
-			console.error("Watchpack Error (initial scan): " + err);
+      if (err.code !== 'ENOTDIR') {
+        console.error("Watchpack Error (initial scan): " + err);
+      }
 		}
 		this.onScanFinished();
 	}