Add newer python versions to tox.ini

tox.ini

@@ -1,11 +1,8 @@
 [tox]
-envlist = py36,py37
+envlist = py36,py37,py38,py39,py310,py311
 skipsdist = true
 
 
 [testenv]
-deps = pipenv==2018.11.14
+deps = .[test]
-passenv = HOME
+commands = python setup.py test
-commands = 
-    pipenv sync -d
-    pipenv run pytest