Configure tox to run tests

tox.ini

@@ -1,10 +1,11 @@
-[pytest]
+[tox]
-envlist = py37,py38
+skipsdist = true
 
 [testenv]
-changedir = tests
+#changedir = tests
 deps =
+    -rrequirements.txt
     pytest
 commands =
     # Any commands go here
-    pytest --basetemp="{envtmpdir}" {posargs}
+    python -m pytest -s --basetemp="{envtmpdir}" {posargs}