Allow custom module access check (enh #88)

[simialbi]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌
Tests pass?	✔️
Fixed issues	#88

[samdark]

Merged. Thank you!

[cebe]

Good addition, but this was already possible before :)

        'debug' => [
            'class' => yii\debug\Module::class,
            'on beforeAction' => function(\yii\base\ActionEvent $event) {
                if ($event->action->id === '...') {
                     // ...
                }
            },
            'as accessControl' => 
                'class' => \yii\filters\AccessControl::class,
                'rules' => [
                    [
                        'allow' => true,
                        'roles' => ['debugger'],
                    ],
                ],
            ],
        ],

[almirb]

Hello @simialbi !

How can I use this callback only if my IP is not in my allowedIPs list?