start supporting cabal-version 3.0

Author: piyush-kurur

Cabal/Distribution/PackageDescription/Parsec.hs

@@ -125,7 +125,7 @@ parseGenericPackageDescription bs = do
     setCabalSpecVersion ver
     -- if we get too new version, fail right away
     case ver of
-        Just v | v > mkVersion [2,2] -> parseFailure zeroPos
+        Just v | v > mkVersion [3,0] -> parseFailure zeroPos
             "Unsupported cabal-version. See https://github.com/haskell/cabal/issues/4899."
         _ -> pure ()