done() should be called when there are not files to validate or formatter is not found

[MarioRomanDono]

In the 24.0.0 version, the 'eslint' task has been changed to be executed asynchronously. However, if there are no files to validate or if the formatter cannot be found, instead of using done(true) or done(false), the value is returned directly.

grunt-eslint/tasks/eslint.js

Lines 26 to 38 in 259ce5c

	if (this.filesSrc.length === 0) {
	grunt.log.writeln(chalk.magenta('Could not find any files to validate'));
	return true;
	}
	const engine = new ESLint(options);
	const formatter = await engine.loadFormatter(format);
	if (!formatter) {
	grunt.warn(`Could not find formatter ${format}`);
	return false;
	}

This causes, at least in my case, the task to get stuck. If you consider this to be a valid issue, I'll be happy to make a pull request with the change.