Support for multiple event listeners

[kiddtang]

Consider supporting multiple event listeners, for example:
I want to record the failed event on both password login failure and 2FA login failed as a login failure.

'events' => [
        'login' => \App\Events\Auth\EmployeeTwoFactorLogin::class,
        'failed' => [
            \Illuminate\Auth\Events\Failed::class,
            \App\Events\Auth\EmployeeTwoFactorFailed::class,
        ],
        'logout' => \Illuminate\Auth\Events\Logout::class,
        'logout-other-devices' => \Illuminate\Auth\Events\OtherDeviceLogout::class,
    ],

Thanks for the hard work!