IModel requires a step function, Screen uses `out` to allow IModel subtypes as parameters to createView, update typescript to 4.7, https://github.com/phetsims/joist/issues/783
IModel requires a step function, Screen uses `out` to allow IModel subtypes as parameters to createView, update typescript to 4.7, https://github.com/phetsims/joist/issues/783

phetsims/vegas,phetsims/vegas,phetsims/vegas