* gnu/packages/python-web.scm (python-h2): Update to 4.1.0.
[native-inputs]: Add python-hypothesis-6.23.
[arguments]: Invoke pytest through `python -m` so it finds the newer
python-hypothesis-6.23.
[home-page]: Update to current url.
Signed-off-by: Lars-Dominik Braun <lars@6xq.net>