update setup.py: switch to README.md, specify encoding, and set markdown as description format

Author: Sam

setup.py

@@ -4,7 +4,7 @@
 
 from setuptools import setup, find_packages
 
-with open('README.rst') as readme_file:
+with open('README.md', encoding='utf-8') as readme_file:
     readme = readme_file.read()
 
 with open('HISTORY.rst') as history_file:
@@ -33,7 +33,8 @@
     description="Ujeebu Python SDK to interact with Ujeebu API",
     install_requires=requirements,
     license="GNU General Public License v3",
-    long_description=readme + '\n\n' + history,
+    long_description=readme,
+    long_description_content_type='text/markdown',
     include_package_data=True,
     keywords='ujeebu_python',
     name='ujeebu_python',