added long_description and long_description_content_type fields i…

…nto `setup.py`, to avoid errors during source generation and wheel building

setup.py

@@ -1,11 +1,16 @@
 import setuptools
 
+with open("README.md", "r", encoding="utf-8") as fh:
+    long_description = fh.read()
+
 setuptools.setup(
     name="inferactively-pymdp",
     version="0.0.7.1",
     author="infer-actively",
     author_email="[email protected]",
     description= ("A Python package for solving Markov Decision Processes with Active Inference"),
+    long_description=long_description,
+    long_description_content_type="text/markdown",
     license='MIT',
     url="https://github.com/infer-actively/pymdp",
     python_requires='>3.7',