implementations - add aiopenapi3

[commonism]

aiopenapi3

A Python OpenAPI 3 Specification client and validator for Python 3.

Features

• implements …
  • Swagger 2.0
  • OpenAPI 3.0.3
  • OpenAPI 3.1.0
• object parsing via pydantic
• request body model creation via pydantic
• pydantic compatible "format"-type coercion (e.g. datetime.interval)
• blocking and nonblocking (asyncio) interface via httpx
• tests with pytest
• providing access to methods and arguments via the sad smiley ._. interface
• api to modify description documents/requests/responses to adapt to non compliant services