Update README.md

Author: yushulx

README.md

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 # Welcome to Dynamsoft Barcode Reader - Python Edition
+[![Supported Python versions](https://img.shields.io/badge/python-3.6%20%7C%203.7%20%7C%203.8-blue)](https://pypi.org/project/dbr/)
+[![PyPI downloads](https://img.shields.io/pypi/dm/dbr)](https://pypistats.org/packages/dbr)
 
 ![Dynamsoft](https://dynamsoft.github.io/styleguide/assets/img-icon/logo-dynamsoft-whiteBg-190x47.png "Dynamsoft")  | ![dbr](https://dynamsoft.github.io/styleguide/assets/img-icon/logo-dbr-88x88.png "dbr")
 
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 **[Dynamsoft's Barcode Reader SDK](https://www.dynamsoft.com/Products/Dynamic-Barcode-Reader.aspx) enables you to efficiently embed barcode reading functionality in your web, desktop or mobile application using just a few lines of code. Saving you months of added development time and resources, our SDK can create high-speed and reliable barcode scanner software applications to meet your business needs.**
 
 ## Dynamsoft Barcode Reader - Python Edition