Update typenats plugins for GHC 9.13
This MR updates ghc-tcplugins-extra and hc-typelits-natnormalise to account for the following minor renaming changes:
isEqPred --> isEqClassPred
isEqPrimPred --> isEqPred
mkPrimEqPred --> mkNomEqPred
from the GHC commit 0225249a43a49e1ef36de14d28a7aadd7c796a95.
Edited by sheaf