try fix tox

Signed-off-by: Alexander Shadchin <[email protected]>

Author: shadchin

tox.ini

@@ -6,7 +6,7 @@ deps =
     coverage
     pytest
     attrs
-    {py3.9,pypy3.9}: twisted
+    py3.9,pypy3.9: twisted
     py3.9: asgiref
     pypy3.9: asgiref
 commands = coverage run --parallel -m pytest {posargs}