Eloquent\Model: mismatched @property annotation type

[rentalhost]

Following #8

This inspection should detects if @property declare at least the specific field type.

/** @propety null $id */
protected $casts = [ 'id' => 'int' ];

// Not acceptable: $id should be `int` or `int|null` (in this case).

• Identify mismatched types (eg. above);
• Make sure to merge existent types instead of overwrite (eg. null + int = int|null);