release_history not updated to v2.6.0

[EJFielding]

The release_history.py file does not have the 2.6.0 release. I think this is why all the ISCE2 programs report the version is still 2.5.3 when we run them.
@rtburns-jpl

[rtburns-jpl]

Thanks. I think we're due for a new bugfix release anyway. I'll make a hotfix for our conda-forge package, and then make a new release that includes an updated release_history.py.

[rtburns-jpl]

The conda-forge package hotfix has been merged, so if you update your conda environments isce2 should show the correct version now. I'm going to be on vacation next week, but once I get back I'll publish the new bugfix release.

[yunjunz]

Thank you for the hotfix @rtburns-jpl. Any idea why the conda-forge version on osx for python 3.7 and 3.9 is failing and not available?

[rtburns-jpl]

I think there is an upstream issue in gdal causing Symbol not found: _ZSTD_compressBound in our tests, which causes the package build to sometimes fail. I've been trying to update to a new version of gdal, but this is blocked by our build failures with latest gfortran versions: conda-forge/isce2-feedstock#49

[EJFielding]

I think we still need to modify https://github.com/isce-framework/isce2/blob/main/release_history.py

[EJFielding]

I added PR #561