Add python 3.9 in ci

RatanShreshtha · RatanShreshtha · commit 5763cd475f2b · 2020-11-06T15:40:33.000+05:30
diff --git a/noxfile.py b/noxfile.py
@@ -61,7 +61,7 @@ def tests_impl(session, extras="socks,brotli"):
     _clean_coverage("coverage.xml")
 
 
-@nox.session(python=["2.7", "3.5", "3.6", "3.7", "3.8", "pypy", "pypy3"])
+@nox.session(python=["3.5", "3.6", "3.7", "3.8", "3.9" "pypy", "pypy3"])
 def test(session):
     tests_impl(session)
 
