Deprecations to be removed in 0.3.0

[ffl096]

Cell Complexes

• [ ] CellComplex.maxdim, use drop-in replacement CellComplex.dim.

Simplicial Complexes

• [ ] SimplicialComplex.maxdim, use drop-in replacement SimplicialComplex.dim.
• [ ] SimplicialComplex.from_spharpy, use drop-in replacement SimplicialComplex.from_spharapy.
• [ ] Simplex.boundary, retrieve them through the SimplicialComplex object instead.
• [ ] Simplex.faces, retrieve them through the SimplicialComplex object instead.