Change to hatchling build backend, and move to src layout#323

JamesParrott merged 2 commits intoGeospatialPython:3.0.0-alphaGeospatialPython/pyshp:3.0.0-alphafrom

mwtoews:hatchling-src-layoutmwtoews/pyshp:hatchling-src-layoutCopy head branch name to clipboard