[BUGFIX] fix default command

core/tasks/default.js

@@ -11,10 +11,13 @@ module.exports = class Default extends Task {
 	 * @override
 	 */
 	async run() {
-		let serverTask = this._settings.tasks.server();
-		new serverTask().run();
-		let watchTask = this._settings.tasks.watch();
-		new watchTask().run();
+		return new Promise(async resolve => {
+			let serverTask = this._settings.tasks.server();
+			await new serverTask().run();
+			let watchTask = this._settings.tasks.watch();
+			await new watchTask().run();
+			resolve();
+		});
 	}
 
 }