fix: fix facade signature (#502)

Author: asbiin

src/Facades/Webauthn.php

@@ -6,10 +6,10 @@
 
 /**
  * @method static \Illuminate\Database\Eloquent\Model create(\Illuminate\Contracts\Auth\Authenticatable $user, string $keyName, \Webauthn\PublicKeyCredentialSource $publicKeyCredentialSource)
- * @method static void login(\Illuminate\Contracts\Auth\Authenticatable $user)
+ * @method static void login(?\Illuminate\Contracts\Auth\Authenticatable $user)
  * @method static void logout()
  * @method static bool check()
- * @method static \LaravelWebauthn\Services\Webauthn\PublicKeyCredentialRequestOptions prepareAssertion(\Illuminate\Contracts\Auth\Authenticatable $user)
+ * @method static \LaravelWebauthn\Services\Webauthn\PublicKeyCredentialRequestOptions prepareAssertion(?\Illuminate\Contracts\Auth\Authenticatable $user)
  * @method static bool validateAssertion(\Illuminate\Contracts\Auth\Authenticatable $user, array $data)
  * @method static \LaravelWebauthn\Services\Webauthn\PublicKeyCredentialCreationOptions prepareAttestation(\Illuminate\Contracts\Auth\Authenticatable $user)
  * @method static \Illuminate\Database\Eloquent\Model validateAttestation(\Illuminate\Contracts\Auth\Authenticatable $user, array $data, string $keyName)