v6.7.1

ModelingToolkit v6.7.1

Diff since v6.7.0

Closed issues:

• observed: questions and issues (#1288)

Merged pull requests:

• Refactor use of the Bareiss algorithm (#1301) (@Keno)
• Fix NullParameter get_unit handling (#1308) (@ChrisRackauckas)
• explicit name argument in example (#1310) (@baggepinnen)
• stop importing unflatten_long_ops (#1313) (@YingboMa)
• Add term handling in build_observed_function (#1315) (@YingboMa)