fix: fix fs.readdir in electron 9

Author: UziTech

lib/helper.js

@@ -164,7 +164,7 @@ export default {
 		const stats = await promisify(fs.stat, {callbackArg: 1})(dir);
 
 		if (stats.isDirectory()) {
-			const filePaths = await promisify(fs.readdir)(dir);
+			const filePaths = await promisify(fs.readdir, {callbackArg: 2})(dir);
 
 			const files = await Promise.all(filePaths.map(filePath => this.getFilesInDir(path.resolve(dir, filePath))));
 			return files.reduce((prev, file) => prev.concat(file), []);