Python 3.12 fix

[vladsavelyev]

Fix compatibility with Python 3.12:

  File "/miniconda3/envs/py3.12/lib/python3.12/site-packages/lzstring/__init__.py", line 11, in <module>
    from future import standard_library
  File "/miniconda3/envs/py3.12/lib/python3.12/site-packages/future/standard_library/__init__.py", line 65, in <module>
    import imp
ModuleNotFoundError: No module named 'imp'

(from MultiQC/MultiQC#2112 (comment))

This breaks Python 2 compatibility though, so probably could be a good excuse to get rid of the Python 2 code? 😄

[eight04]

@gkovacs PythonCharmers/python-future#625

[bluenote10]

Would it be possible to release a version to PyPI with Python 3.12 support?