Lintian tag information: missing-prerequisite-for-pyproject-backend (type: information)

Description (from lintian-explain-tags)

pybuild now supports building with PEP-517 standard interfaces natively.
These sources could be built using pybuild's generic pyproject plugin and
the named build backend.

Please declare both named prerequisites in Build-Depends. You will need
both the generic pybuild-plugin-pyproject as well as the specific one to
the named backend. It is usually python3-${backend}.

No changes are required if you are using pybuild's dedicated flit plugin,
although that plugin will eventually be deprecated in favor of the generic
pyproject plugin mentioned above.

Visibility: info
Show-Always: no
Check: languages/python

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