v1.6.5

What's Changed

• Add option to gen-excel to support splitting up workbook on a per class basis by @sujaypatil96 in #1732
• Adding a how-to on managing releases by @cmungall in #1765
• Issue 1696 pydantic regex support by @nicholsn in #1772
• Convert tests in tests/test_utils to pytest by @pkalita-lbl in #1768
• Convert tests in tests/test_validator to pytest by @pkalita-lbl in #1769
• Convert tests in tests/test_workspaces to pytest by @pkalita-lbl in #1770
• slots defined in an ancestor mixin, should be distributed to classes defined as having descendent mixins (pythongen) fixes #1671 by @sierra-moxon in #1752

Full Changelog: v1.6.4...v1.6.5