docs(readme): update readme and add badges

README.md

@@ -1,4 +1,10 @@
 Flask-Session
 =============
 
-Flask-Session is an extension for Flask that adds support for Server-side Session to your application.
+## Forked Version
+
+[![image](https://img.shields.io/pypi/v/flask-providers-session.svg?style=flat)](https://pypi.python.org/pypi/flask-providers-session)![https://github.com/benbenbang/flask-session/actions/workflows/wf-ci.yml/badge.svg&flat](https://github.com/benbenbang/flask-oidc/actions/workflows/wf-ci.yml/badge.svg) ![https://img.shields.io/pypi/pyversions/flask-providers-session](https://img.shields.io/pypi/pyversions/flask-providers-session) ![https://img.shields.io/pypi/format/flask-providers-session&flat](https://img.shields.io/pypi/format/flask-providers-session) ![https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white&flat)
+
+This project is forked from [flask-session](https://github.com/fengsp/flask-session), and is now renamed **flask-providers-session**. Flask-Session is an extension for Flask that adds support for Server-side sessions to your application.
+
+Note that this version stops supporting python 2.