Aiohttp-swagger3

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- fixed bug that empty security raises an Exception (88)
- added the ability to set global security in SwaggerDocs via security parameter
- added decorator `swagger_doc`, it can be used to add swagger schema from yaml file, see examples/docs_decorator_and_docstrings
- bump swagger ui to 3.50.0
- bump redoc ui to v2.0.0-rc.54

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- bump attrs version

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- detailed error info for allOf
- bump rapidoc ui to 8.4.9
- bump redoc ui to v2.0.0-rc.50
- bump swagger ui to 3.45.1

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- allOf, oneOf, anyOf can be nullable
- readOnly should affect only properties

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- Happy New Year!
- added required readOnly support
- bump rapidoc ui to 8.4.3
- bump swagger ui to 3.38.0

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- added readOnly support
- bump swagger ui to 3.37.2