UpdatedDependency: move to pathlib2

[cs8898]

I had to move pathlib to the newer release pathlib2
I was not able to install the "old" pathlib module

Now its up and running again

[kw90]

Same here, I was getting the following error when installing pathlib:

Collecting pathlib
  Using cached pathlib-1.0.1.tar.gz (49 kB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [1 lines of output]
      ERROR: Can not execute `setup.py` since setuptools is not available in the build environment.
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

pathlib2 seems to do the trick.