Describe the bug

Properties using generic array syntax and defining key type are ignored.

To Reproduce

1. Create an entity (of type Nextras\Orm\Entity\Entity)
2. Add property @property array<string, string> $example
3. Assign value to $example property, EntityMetadata should throw exception

Expected behavior

@property array<string, string> $example is a valid property, same as (currently valid) @property array<string> $example or at least throw an exception describing syntax is not supported.

Versions::

• Orm: 4.0.2
• Dbal: 4.0.2
• Database: Postgres 13