Fix issues with dependency resolution

[jmsmkn]

There is currently a clash between Tox and Poetry:

    tox 4.5.0 depends on platformdirs>=3.2
    poetry 1.4.2 depends on platformdirs<3.0.0 and >=2.5.2
    tox 4.5.0 depends on platformdirs>=3.2
    poetry 1.4.1 depends on platformdirs<3.0.0 and >=2.5.2
    tox 4.5.0 depends on platformdirs>=3.2
    poetry 1.4.0 depends on platformdirs<3.0.0 and >=2.5.2