Combinators those help to work with homogenous sets of sub-models (in a form of
updateEach : (Basics.Int -> TeaCombine.Pure.Update model msg) -> TeaCombine.Ix msg -> Array model -> Array model
Updates each sub-model in @Array using a function from sub-model index to sub-update.
updateAll : List (TeaCombine.Pure.Update model msg) -> TeaCombine.Pure.Update (Array model) (TeaCombine.Ix msg)
Updates an @Array of sub-models using a @List of sub-updates.