chore: readme

Author: phi-friday

README.md

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+# python-socketio-stubs
+
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![PyPI version](https://badge.fury.io/py/python-socketio-stubs.svg)](https://badge.fury.io/py/joblib-stubs)
+[![python version](https://img.shields.io/pypi/pyversions/python-socketio-stubs.svg)](#)
+
+Warning: This library provides type hints only.
+If you need the runtime package,
+you can find it [`python-socketio`](https://github.com/miguelgrinberg/python-socketio).
+
+## how to install
+```shell
+$ pip install python-socketio-stubs
+```
+
+## TODO
+* [ ] remove all `Incomplete`
+* [ ] tests?
+
+## License
+
+MIT, see [LICENSE](https://github.com/phi-friday/python-socketio-stubs/blob/main/LICENSE).