Fiona

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- The 1.8.9.post1 release introduced a bug affecting builds of the package from
a source distribution using GDAL 2.x. This bug has been fixed in commit
960568d.

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- A change has been made to the package setup script so that the shim module
for GDAL 3 is used when building the package from a source distribution.
There are no other changes to the package.

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- A shim module and support for GDAL 3.0 has been added. The package can now be
built and used with GDAL 3.0 and PROJ 6.1 or 6.2. Note that the 1.8.9 wheels
we will upload to PyPI will contain GDAL 2.4.2 and PROJ 4.9.3 as in the 1.8.8
wheels.

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- The schema of geopackage files with a geometry type code of 3000 could not be
reported using Fiona 1.8.7. This bug is fixed.

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Bug fixes:

- Regression in handling of polygons with M values noted under version 1.8.5
below was in fact not fixed then (see new report 789), but is fixed in
version 1.8.7.
- Windows filenames containing "!" are now parsed correctly, fixing issue 742.

Upcoming changes:

- In version 1.9.0, the objects yielded when a Collection is iterated will be
mutable mappings but will no longer be instances of Python's dict. Version
1.9 is intended to be backwards compatible with 1.8 except where user code
tests `isinstance(feature, dict)`. In version 2.0 the new Feature, Geometry,
and Properties classes will become immutable mappings. See
https://github.com/Toblerity/fiona-rfc/blob/main/rfc/0001-fiona-2-0-changes.md
for more discussion of the upcoming changes for version 2.0.

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- The advertisement for JSON driver enablement in 1.8.5 was false (176), but
in this release they are ready for use.