Fix 22
Docs: Readme update.
Style: Python code style format.
What's Changed
* Fix typo in readme by AmbientLighter in https://github.com/luojilab/django-mirage-field/pull/19
* Improved short secret key message by ZviBaratz in https://github.com/luojilab/django-mirage-field/pull/21
New Contributors
* AmbientLighter made their first contribution in https://github.com/luojilab/django-mirage-field/pull/19
* ZviBaratz made their first contribution in https://github.com/luojilab/django-mirage-field/pull/21
**Full Changelog**: https://github.com/luojilab/django-mirage-field/compare/1.0.1...1.2.3