v2.7.3

ModelingToolkitStandardLibrary v2.7.3

Diff since v2.7.2

Merged pull requests:

• ci: standardise workflows using SciML's reusable workflows (#293) (@thazhemadam)
• Fix testing setup (#299) (@ChrisRackauckas)
• docs: use t_nounits as t (#300) (@ven-k)
• Fix missing docs svgs (#301) (@ChrisRackauckas)
• ci: run tests on CI with the groups set correctly (#302) (@thazhemadam)
• Remove unnecessary defaults (#304) (@ChrisRackauckas)