Create restart parameters
spim_restart_pars(pars, pars_parent, restart_date)The full set of parameters. This is a list with the
baseline (base) along with prior, info and transform.
The parameters from the parent fit; this must
be a spim_pars_mcmc object
The date that restart happens, will be pased
through spimalot::as_sircovid_date
An object with the same structure as pars but with the
prior element updated and an mcmc element added.