**NOTE:** the interactive `pybdsf` shell is no longer installed by default. Please see the [README](https://github.com/lofar-astron/PyBDSF#readme) for installation instructions.
* Update some functions as required by scipy versions >= 1.8.0 (PR 172)
* Fix build issues with Python 3.8, end support for Python < 3.6, add support
for Python 3.8 and 3.9, and make installation of the interactive pybdsf shell
optional (PR 169)
* Improve handling of the beam in the spectral index module (PR 165)
* Improve handling of large, complex islands (PR 160)
* Allow a file to be supplied for the ch0 image used in the spectral index module (PR 127)
* Plus fix many other minor bugs and issues