rasterio 1.4.3 on Python PyPI

Version 1.4.3 fixes two major regressions and several other minor bugs.

Erroneous masking of 0-valued raster data by boundless, masked reads has been fixed (#3268).
If passed a dataset object, rasterio.open() now raises TypeError instead of proceeding and crashing (#3266).
All options of GDALFillNodata() are now supported by rasterio.fill.fill nodata() (#3265).
The flag for GDAL driver registration has been changed to an _env module attribute. Drivers should only be registered once per process at most (#3260). A side effect of this is that the GDAL_SKIP configuration option, which affects format driver registration, only has an effect the first time a dataset is opened.
Allow a dataset's compression metadata to surface in profile and compression properties even if the value isn't present in the Compression enum (#3259).
A bug that causes CRS.from_wkt().is_epsg_code() to erroneously return False when an EPSG code is embedded in WKT has been fixed (#3258).
IAU 2015 has been added to the list of known CRS authorities (#3243).
A major performance regression in Rasterio's merge tool has been corrected (#3234).

CRS._matches() has been rewritten to better support CRS.to_authority() and CRS.to_epsg() (#3255).