pysal/spaghetti: v1.6.6

What's Changed Other Changes Pytest-xdist for multicore tests by @jGaboardi in https://github.com/pysal/spaghetti/pull/661 update supported Python versions by @jGaboardi in https://github.com/pysal/spaghetti/pull/662 update black version in .pre-commit by @jGaboardi in https://github.com/pysal/spaghetti/pull/663 Add contact/support stipulations in docs, etc. by @jGaboardi in https://github.com/pysal/spaghetti/pull/664 update CI badge by @jGaboardi in https://github.com/pysal/spaghetti/pull/665 Timeout test is stalling by @jGaboardi in https://github.com/pysal/spaghetti/pull/668 Update release_and_publish.yml by @jGaboardi in https://github.com/pysal/spaghetti/pull/669 Update .pre-commit-config.yaml by @jGaboardi in https://github.com/pysal/spaghetti/pull/673 update/rerun notebooks by @jGaboardi in https://github.com/pysal/spaghetti/pull/672 Drop Python 3.7 support by @jGaboardi in https://github.com/pysal/spaghetti/pull/674 Full Changelog: https://github.com/pysal/spaghetti/compare/v1.6.5...v1.6.