Version Pinning of Pydantic to match FastAPI

[hexazero]

The goal of this project is to use it in combination with FastAPI:

• FastAPI: https://github.com/tiangolo/fastapi

However, both this project and FastAPI depend on Pydantic:

• Pydantic: https://github.com/samuelcolvin/pydantic

As a dependency, Pydantic moves faster than FastAPI.

My current plan is to closely monitor FastAPI and pin to the latest version of Pydantic that it uses.

As of yesterday (June 28, 2019), Version 0.31 of FastAPI was released and it pins to 0.29 of Pydantic. So I am fixing a bug broke by the internals of Pydantic that I was using to support some of the ormantic use cases and pushing up a change to pypi if anyone is using that.

More details:
https://pypi.org/project/fastapi/0.31.0/#history
https://github.com/tiangolo/fastapi/pull/344/files

[hexazero]

Posted 0.0.29 that pins to pydantic v0.29:
https://pypi.org/project/ormantic/#history

Code that fixes bug with change to pydantic will be committed next.

[maxrdu]

Currently FastAPI is at version 0.32.2 of Pydantic while ormantic is till at 0.29 therefor it is currently not useable. Would be nice if you could bump the version up