fix(team): Add nullable team_id

[Androlax2]

Added null to helpers getPermissionsTeamId and setPermissionsTeamId and in the PermissionRegistrar.

This is to fix a PHPStan problem :

Parameter #1 $id of function setPermissionsTeamId expects Illuminate\Database\Eloquent\Model|int|string, null given.

But when you put '', my tests are failing because it expects a null as per the doc.

[drbyte]

@erikn69 any downsides to this?

[erikn69]

It doesn't affect anything
Seems like a fix to me

laravel-permission/src/PermissionRegistrar.php

Lines 101 to 103 in 3e4630f

	* @param int|string|\Illuminate\Database\Eloquent\Model|null $id
	*/
	public function setPermissionsTeamId($id): void

[drbyte]

Thanks!

[func0der]

Could have added the type to the property, too, since it is initialized with null.
Would make the whole thing more coherent.

Thanks for the fix. Was about to open a bug report for is myself just now xD