Pin python-multipart to latest version 0.0.6

[pyup-bot]

This PR pins python-multipart to the latest release 0.0.6.

Changelog

0.0.6

* Migrate package installation to `pyproject.toml` (PEP 621) [54](https://github.com/andrew-d/python-multipart/pull/54).
* Use yaml.safe_load instead of yaml.load [46](https://github.com/andrew-d/python-multipart/pull/46).
* Add support for Python 3.11, drop EOL 3.6 [51](https://github.com/andrew-d/python-multipart/pull/51).
* Add support for Python 3.8-3.10, drop EOL 2.7-3.5 [42](https://github.com/andrew-d/python-multipart/pull/42).
* `QuerystringParser`: don't raise an AttributeError in `__repr__` [30](https://github.com/andrew-d/python-multipart/pull/30).

Links

• PyPI: https://pypi.org/project/python-multipart
• Changelog: https://pyup.io/changelogs/python-multipart/