hatchling build requires license file but the build that coincurve
21.0.0 uses doesn’t account for that in `build_hatch.py` this was added
to prevent need of `cffi` as a runtime dependency but we can probably
live without it until it gets fixed.
change MR: https://github.com/ofek/coincurve/pull/176
reported issue: https://github.com/ofek/coincurve/issues/187