v9.66.0

ModelingToolkit v9.66.0

Diff since v9.65.0

Merged pull requests:

• feat: ImplicitDiscreteSystem (#3386) (@vyudu)
• fix: fix DEF parameters for split = true, flatten = false systems (#3403) (@AayushSabharwal)
• feat: implement SciMLBase.detect_cycles (#3427) (@AayushSabharwal)
• fix: fix symbolic maps given to linearize, warn in linearization_function (#3432) (@AayushSabharwal)
• feat: support analysis points duplicating existing connections (#3453) (@AayushSabharwal)
• Fix: Make build explicit observed function return Expr when expression=true (#3454) (@ashutosh-b-b)
• test: relax initializationsystem test (#3455) (@AayushSabharwal)
• fix: don't use === for comparison in variable metadata tests (#3463) (@AayushSabharwal)
• build: bump minor version (#3465) (@AayushSabharwal)

Closed issues:

• ImplicitDiscreteSystem (#2077)
• complete(sys; flatten=false) creates unexpected DEF parameters (#3322)
• DEF in parameters (#3401)
• Strange error when evaluating the Jacobian for certain systems (#3447)
• ODEFunction from the same ODESystem gives inconsistent ODE solve result (#3450)
• Can create NonlinearProblem with missing variables (#3461)
• Strange DEF parameter appears in parameter(sys) for certain systems (#3464)