Issue building with python 3.7

[smurfy]

I having issues building within docker container using pythons 3.7 alpine image.

Traceback (most recent call last):
  File "/usr/local/bin/zing", line 5, in <module>
    from pootle.runner import main
  File "/usr/local/lib/python3.7/site-packages/pootle/runner.py", line 18, in <module>
    import syspath_override  # noqa
ModuleNotFoundError: No module named 'syspath_override'

This traces back to: bc1881c
Older versions of zing work.

[li-dl]

Same error message as issue #480.

[jmartens]

I was able to fix this by changing import syspath_override to from .syspath_override import *

[bdube]

I make the same change as @jmartens and it seems others do as well. With Python 3.7 listed as the requirement, would this change support 3.7 up to current 3.11, so that a pull request could help solve this?

[smurfy]

No idea if its still relevant or not, but it works with this patch in 3.11 too.
I also needed to tweak the dependencies a bit to proper build.

You can find my tweaks here: https://github.com/smurfy/docker-zing-serge