v8.8.0

ModelingToolkit v8.8.0

Diff since v8.7.1

Closed issues:

• The callback problem of modelingtoolkit (#1527)
• Error when solving a modelingtoolkitized system that uses StaticArrays (#1529)
• Question about the Cvode(cvode_mem, tout, y0, &t, CV_NORMAL) command (#1531)
• UndefVarError, the solution object can't be accessed by symbols again (#1533)

Merged pull requests:

• Add but_ordered_incidence (#1534) (@YingboMa)
• Give the ModelingToolkit Standard Library some space in the docs (#1535) (@ChrisRackauckas)
• Add allow_symbolic and allow_parameter as options in structural_simplify (#1538) (@YingboMa)