Ninja-schema

What's Changed
* M2MLink Validation Fix by eadwinCode in https://github.com/eadwinCode/ninja-schema/pull/1
* Codev Test Fix by eadwinCode in https://github.com/eadwinCode/ninja-schema/pull/2

New Contributors
* eadwinCode made their first contribution in https://github.com/eadwinCode/ninja-schema/pull/1

**Full Changelog**: https://github.com/eadwinCode/ninja-schema/compare/0.12.8...0.13.0

- mypy update fix
- updated supported django versions

- Ensured all django models fields are supported
- Increased test coverage

- Fixed bug with optional field having default_factory fieldinfo parameter

First Release