Bug#1138891: python-aiortc: Missing depencency google-crc32c>=1.1

[Johnny Accot]

There is at least a second dependency issue: aiortc requires av<17.0.0 
(see pyproject.toml), while testing has version 17.0.1.  pkg_resources 
issues this error:

pkg_resources.ContextualVersionConflict: (av 17.0.1 
(/usr/lib/python3/dist-packages), 
Requirement.parse('av<17.0.0,>=14.0.0'), {'aiortc'})

If the module works with av 17 anyway, maybe patch pyproject.toml before 
building to ignore the upper constraint.