Unoconv deprecation

[ilianoKokoro]

I get this warning when running my app on Linux as Unoconv is using deprecated features of Python. However, Unoconv is now also deprecated according to their Readme and now rewritten as Unoserver

/usr/bin/unoconv:19: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
  from distutils.version import LooseVersion

From the Unoconv GitHub Readme

Unoconv is deprecated

Please note that there is a rewrite of Unoconv called "Unoserver": https://github.com/unoconv/unoserver/

We are running Unoserver successfully in production, and it’s now the recommended solution.

Unoserver does not have all the features of Unoconv, which features it will get depends on a combination of what people want, and if someone wants to implement it.

Until Unoserver has all the major features people need, Unoconv is in bugfix mode, there will be no major changes. Once Unoserver has the major features of Unoconv, Unoconv will become unsupported.