Autograde uses old version of Python's unittest

[tc-kirby]

Autograde seems to use an old version of unittest. The latest one has some great features like assertListEqual(). I know this might not be a main priority right now, but it would be great if it supported a more recent version.

[bnmnetp]

The unittest module comes from the skulpt project and the various assertXXX type tests are all written in Python.

This would be an excellent area for incremental improvement, and an area where I think someone wanting to help out the community could make a contribution of code. (see src/lib/unittest/__init__.py) in the skulpt repo. As one of the maintainers of skulpt I would be happy to merge a PR that added new ways of testing to the unittest library.