* gnu/packages/python-xyz.scm (python-box): Update to 7.1.1.
[source]: Download from github since pypi tarball does not contain all
test files.
[build-system]: Use pyproject-build-system.
[propagated-inputs]: Remove python-toml; add python-tomli and
python-tomli-w.
[native-inputs]: Add python-cython, python-pytest, and python-wheel.
Change-Id: Ia39063054821e75768b1d9a5c937eab432e7c59e
Reviewed-by: Munyoki Kilyungi <me@bonfacemunyoki.com>
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>