fix specialized casting for monotonic in coercions
fix specialized casting for monotonic in coercions

akuhlens/schml,Gradual-Typing/Grift,Gradual-Typing/Grift,akuhlens/schml,akuhlens/schml,akuhlens/schml,Gradual-Typing/Grift,akuhlens/schml,akuhlens/schml,Gradual-Typing/Grift