Feat: Change nullable & type for OpenApi v3.1.0

[DjordyKoert]

Type changes to support OpenApi v3.1.0.

• Do not allow nullable to be set when using OpenApi v3.1.0
• Add array as an option to type property when using OpenApi v3.1.0

Fixes

• [PHP 8.2] OpenApi\\Analysis::getSchemaForSource(): Argument #1 ($fqdn) must be of type string, array given #1464
  OpenApi\\Analysis::getSchemaForSource() method could be passed an array of types causing this TypeError
• Define multiple types for a property #1257

Related issues

• OpenAPI 3.1 support #885

[DerManoMann]

Thanks @DjordyKoert

[DjordyKoert]

Thank you as well @DerManoMann 😄