ResFinder: Please drop build-dependency on pdm-pep517, use pdm-backend instead

[Boyuan Yang]

As seen from pyproject.toml, your software build-depends on pdm-pep517. According to https://github.com/pdm-project/pdm-backend/tree/legacy , this package is replaced by pdm-backend. Please consider also move to pdm-backend to replace the legacy pdm-pep517. Thanks!

[RolfKaas]

PDM backend has been changed to pdm-backend