Rioxarray

------
- BUG: Fix setting spatial dims internally during propagation (pull 682)
- ENH: Pass on on-disk chunk sizes as preferred chunk sizes to the xarray backend (pull 678)
- MNT: add __all__ to top level module (issue 680)

------
- BUG: Fix :mod:`rioxarray.merge` CRS check (pull 655)
- BUG: Remove tags with metadata added by rasterio in :func:`rioxarray.open_rasterio` (issue 666)

------
- DEP: Drop Python 3.8 support (issue 582)
- DEP: pin rasterio>=1.2 (pull 642)
- BUG: Fix WarpedVRT in :func:`rioxarray.open_rasterio` when band_as_variable=True (issue 644)
- BUG: Fix usage of `encode_cf_variable` in `rio.to_raster` (pull 652)

------
- DEP: pin numpy>=1.21 (pull 636)

------
- BUG: Handle data type error in `rio.reproject` (issue 618)

------
- BUG:dataset: Fix writing tags for bands (issue 615)
- BUG:dataset: prevent overwriting long_name attribute (pull 616)