Xarray-spatial

- Remove numpy version pin (637)
- aspect: added benchmarks (640)
- Clean gitignore and manifest files (642)
- Benchmark results (643)
- handle CLI errors 442 (644)
- Cupy zonal (639)
- Tests improvements (636)

- Add benchmarking framework using asv (595)
- Fix classify bug with dask array (599)
- polygonize function on cpu for numpy-backed xarray DataArrays (585)
- Test python 3.9 on CI (602)
- crosstab: speedup dask case (596)
- Add benchmark for CPU polygonize (605)
- Change copyright year to include 2021 (610)
- Docs enhancement (604, 628)
- code refactor: use array function mapper, add messages param to not_implemented_func() (612)
- condense tests (613)
- Multispectral fixes (617)
- Change copyright year to 2022 (622)
- Aspect: convert to float if int dtype input raster (619)
- direction(), allocation(): set all NaNs at initalization (618)
- Add rtx gpu hillshade with shadows (608)
- Add hillshade benchmarking, for numpy, cupy and rtxpy (625)
- Focal mean: handle nans inside kernel (623)
- Convert to float32 if input raster is in int dtype (629)

- Added a pure numba hillshade that is 10x faster compared to numpy (542)
- dask case proximity: process whole raster at once if max_distance exceed max possible distance (558)
- pathfinding: `start` and `goal` in (y, x) format (550)
- generate_terrain: cupy case, dask numpy case (555)
- Optimize natural_break on large inputs (562)
- Fixes in CPU version of natural_breaks. (562) (563)
- zonal stats, speed up numpy case (568)
- Ensure that cupy is not None (570)
- Use explicit cupy to numpy conversion in tests (573)
- zonal stats: speed up dask case (572)
- zonal_stats: ensure chunksizes of zones and values are matching (574)
- validate_arrays: ensure chunksizes of arrays are matching (577)
- set default value for num_sample (580)
- Add rtx gpu viewshed and improve cpu viewshed (588)

- Refactored proximity module to avoid rechunking (549)

- Added dask support to proximity tools (540)
- Refactored the resample utils function and changed their name to canvas_like (539)
- Added zone_ids and cat_ids param to stats zonal function (538)

- Added Dask support for stats and crosstab zonal functions (502)
- Ignored NaN values on classify functions (534)
- Added agg param to crosstab zonal function (536)