Merge pull request #70 from Yuan-ManX/README

Update README.md

Author: ksolo

README.md

@@ -1,5 +1,6 @@
 # aisuite
 
+[![PyPI](https://img.shields.io/pypi/v/aisuite)](https://pypi.org/project/aisuite/)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
 Simple, unified interface to multiple Generative AI providers.