Merge branch 'main' into xpress_slack_bug #73

Job	Run time
linux/3.8/bare-env	11s
lint/style-and-typos	1m 54s
linux/3.12	20m 31s
osx/3.10	23m 29s
win/3.9	55m 52s
linux/3.11/conda	23m 13s
linux/3.10/mpi	8m 39s
linux/3.10/cython	23m 59s
win/3.8/pip	35m 19s
process-coverage-${{ matrix.TARGET }}	0s
	3h 13m 7s

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