Merge pull request #18 from sevein/dev/py-min-version

Add min. Py3 version required

Author: firdaus

README.md

@@ -1,6 +1,10 @@
 > I'm doing a survey to figure out the way forward for this library - https://airtable.com/shrJWfd63yBWSJKoI <br/>
 > Your feedback is very much appreciated!
 
+<p>
+<img alt="PyPI - Python Version" src="https://img.shields.io/pypi/pyversions/cadence-client">
+</p>
+
 # Intro: Fault-Oblivious Stateful Python Code
 
 cadence-python allows you to create Python functions that have their state (local variables etc..) implicitly saved such that if the process/machine fails the state of the function is not lost and can resume from where it left off. 

setup.py

@@ -22,6 +22,8 @@
     ],
     classifiers=[
         "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
     ],