Merge pull request #269 from lavanya-f5/python3.10_supp

python upgrade

Author: chandrajr

setup_requirements.txt

@@ -19,6 +19,6 @@ pycparser==2.19
 urllib3==1.24.2
 six==1.12.0
 attrs==18.2.0
-cffi==1.12.2
+cffi==1.15.0
 pyrsistent==0.14.11
 setuptools==46.3.1