SDK-1600: Use README.md for package long_description

Author: echarrod

setup.py

@@ -2,13 +2,6 @@
 from setuptools import find_packages
 from setuptools import setup
 
-long_description = (
-    "This package contains the tools you need to quickly "
-    "integrate your Python back-end with Yoti, so that your "
-    "users can share their identity details with your "
-    "application in a secure and trusted way."
-)
-
 version = {}
 with open("yoti_python_sdk/version.py") as fp:
     exec(fp.read(), version)
@@ -19,7 +12,8 @@
     packages=find_packages(include=["yoti_python_sdk", "yoti_python_sdk.*"]),
     license="MIT",
     description="The Yoti Python SDK, providing API support for Login, Verify (2FA) and Age Verification.",
-    long_description=long_description,
+    long_description=open("README.md").read(),
+    long_description_content_type="text/markdown",
     url="https://github.com/getyoti/yoti-python-sdk",
     author="Yoti",
     author_email="websdk@yoti.com",