devel/py-unittest2pytest: Import version 0.3

unittest2pytest is a tool that helps rewriting Python unittest
test-cases into pytest test-cases. In contrast to other similar tools,
this handles keyword arguments, handles single-line test-cases and
several tests on one line, and uses context-handlers where
appropriate.  This is done by using lib2to3 and Python's mighty
inspect module.

(minskim)