wwang721/py-afv: Release v0.3.0

See the latest version in https://github.com/wwang721/py-afv Breaking Changes We add a small cutoff $\delta$ to regulate the singularity of the detachment forces, and also provide methods to compute the optimal radius $\ell_0$ within the dataclass `PhysicalParams`. The new module structure changes the recommended import pattern from `from afv.finite_voronoi import PhysicalParams, FiniteVoronoiSimulator` to `import afv` followed by `afv.PhysicalParams`, etc. This is a breaking API change. What's Changed Feature/divergence by @wwang721 in https://github.com/wwang721/py-afv/pull/9 Full Changelog: https://github.com/wwang721/py-afv/compare/v0.2.2...v0.3.0