update to address 29 Dec comments by @slivingston #961

Job	Run time
Py3.10; no Slycot; no Pandas; no CVXOPT	5m 32s
Py3.10; no Slycot; no Pandas; conda CVXOPT	5m 45s
Py3.10; conda Slycot; no Pandas; no CVXOPT	5m 55s
Py3.10; conda Slycot; no Pandas; conda CVXOPT	5m 43s
Py3.12; no Slycot; no Pandas; no CVXOPT	5m 43s
Py3.12; no Slycot; no Pandas; conda CVXOPT	6m 10s
Py3.12; conda Slycot; no Pandas; no CVXOPT	6m 18s
Py3.12; conda Slycot; no Pandas; conda CVXOPT	6m 24s
Py3.12; conda Slycot; conda Pandas; conda CVXOPT ; QtAgg	6m 42s
Finalize parallel coveralls	4s
	54m 16s

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