Ddfacet

Minor changes to build systems to fix issues introduced by astropy/ipython and pip upgrade behavioral changes

Minor release to fix:
- firm dependency on meqtrees-cattery accidentally introduced in heterogeneous beam support
- minor fix to affinities to ensure they can be disabled, courtesy of kgourdji

Release notes
===========
- Adds SSD2 experimental mode
- Adds ATCA beam exeperimental mode
- Adds heterogeneous beam support for SKA-MID via FITSBeams
- Double precision and AIPS style faceting available as modes
- Fixes chunking issue in SPI fitting
- Improves smoothbeam interpolation
- Write out average MFS images
- Add stimela v2 support
- Add Python 3.8 support

RELEASE NOTES
-------------------------------------

- This version includes substantial bug fixes to Hogbom when deconvolving with empty bands and fixes flux scales off axis in improved MFS weighting.
- Major fixes to parallelism of SSD and deadlocking deconvolution
- Major residual python 3 fixes to SSD
- Major residual python 3 fixes to killMS interop
- Added UV tapering support through adjustable sigmoid rolloff tapers
- Fixes to SkyModel auto and manual tesselation and masking processes
- Added ability to apply parallactic angle derotation of crosshand calibrated visibility products to deconvolve and construct a model in SKY relative frame for Alt-Az mounted antennae

Minor fixes to build system
- new docker images pushed
- manifest includes cc files
- fixes lofar beam breakage.

Minor release
- fixes to makemask
- depend on release version of shared array and updated versions of other packages