src/rank_filter.pxd: Add a shim using fused types to provide access to `lineRankOrderFilter1D` in a usable manner from Python.
src/rank_filter.pxd: Add a shim using fused types to provide access to `lineRankOrderFilter1D` in a usable manner from Python.

nanshe-org/rank_filter,jakirkham/rank_filter,jakirkham/rank_filter,jakirkham/rank_filter,DudLab/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter