remove gemfury

[gmanchon]

requires lewagon/python-utilities#26

removes the GHA publishing the package to Gemfury on push

bumps the package version and updates the doc

[Eschults]

Let's check the failing test on this one 👇

  × Getting requirements to build editable did not run successfully.
  │ exit code: 1
  ╰─> [3 lines of output]
      error in challengify setup command: 'install_requires' must be a string or iterable of strings containing valid project/version requirement specifiers; Expected end or semicolon (after name and no valid version specifier)
          git+https://github.com/lewagon/python-utilities>=0.2.15
             ^
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build editable did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.
Error: Process completed with exit code 1.