Add support for OpenAPI 3.2.0

[mrlubos]

https://github.com/OAI/OpenAPI-Specification/releases/tag/3.2.0

[mazen-isstech]

• Support the new query method

This one is interesting.

QUERY is semantically similar to GET. But unlike GET, it specifies that a request body must be allowed. This is useful when you have complex list filters. Currently, the go-to alternative to GET is POST, but that has its own issues. For example, POST is used for creating resources, so another endpoint with the same path for querying would result in a naming conflict. This means you have to design special path for querying. Like:

POST /users
POST /users/list

With QUERY, you can separate the operations by method:

POST /users
QUERY /users