Inhibit -Wnoncanonical-monadfail-instances for GHC 8.8+

It's an obsolete warning for GHC 8.8+

Author: hvr

parsec.cabal

@@ -87,7 +87,9 @@ library
 
     ghc-options: -Wall
     if impl(ghc >= 8.0)
-        ghc-options: -Wcompat -Wnoncanonical-monad-instances -Wnoncanonical-monadfail-instances -Wno-trustworthy-safe
+        ghc-options: -Wcompat -Wnoncanonical-monad-instances -Wno-trustworthy-safe
+        if impl(ghc < 8.8)
+          ghc-options: -Wnoncanonical-monadfail-instances
     else
         -- provide/emulate `Control.Monad.Fail` and `Semigroup` API for pre-GHC8
         build-depends: fail == 4.9.*, semigroups >= 0.18 && < 0.20