tests: more py2 deprecation

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-# deprecation warning: py{27,py2,34,35}
+# deprecation warning: py{27,py2,34,35,36}
 envlist=py{27,34,35,36,37,38,39,py2,py3}{,-tf}{,-keras}, perf, setup.py
 isolated_build=True
 
@@ -13,9 +13,9 @@ deps=
     pytest
     pytest-cov
     pytest-timeout
-    py{37,38,39}: pytest-asyncio
-    !py{27,py2}: ipywidgets
-    !py{27,py2}: git+https://github.com/casperdcl/nbval.git@named_cells#egg=nbval
+    py3{7,8,9}: pytest-asyncio
+    py3{6,7,8,9}: ipywidgets
+    py3{6,7,8,9}: git+https://github.com/casperdcl/nbval.git@named_cells#egg=nbval
     coverage
     coveralls
     codecov
@@ -34,7 +34,7 @@ deps=
     numpy
     pandas
     keras: keras
-    py{36,37,38,39}: rich
+    py3{6,7,8,9}: rich
     tf: tensorflow
 commands=
     !py{27,py2}: pytest --cov=tqdm --cov-report= tests_notebook.ipynb --nbval --current-env -W=ignore --sanitize-with=setup.cfg