Merge pull request #2219 from mwcraig/use-pytest

Use pytest instead of nose for tests

Author: jasongrout

docs/source/dev_testing.md

@@ -3,7 +3,7 @@ Testing
 
 To run the Python tests:
 
-    nosetests --with-coverage --cover-package=ipywidgets ipywidgets
+    pytest --cov=ipywidgets ipywidgets
 
 To run the Javascript tests in each package directory: