Log Message:
geography/py-proj: Update to 2.6.1

Note that while upstream talks about "wheels", this package links
against an installed proj.

Upstream changes:

* WHL: Wheels contain PROJ version is 7.0.1
* BUG: Allow `*_name` to be added in `pyproj.crs.CRS.to_cf()` (issue #585)
* BUG: Fix building prime meridian in `pyproj.crs.CRS.from_cf()` (pull #588)
* BUG: Fix check for numpy bool True kwarg (pull #590)
* DOC: Update pyproj.Proj docstrings for clarity (issue #584)
* Added `pyproj.__proj_version__`
* BUG: Fix `pyproj.proj.Proj.get_factors()` (issue #600)
* BUG: fix unequal (!=) with non-CRS type (pull #596)