Added ability to set extensions on GQLMessageException

Author: xperiandri

src/FSharp.Data.GraphQL.Server/Exceptions.fs

@@ -30,8 +30,8 @@ type GQLMessageExceptionBase (errorKind, msg, [<Optional>] extensions) =
             |> GQLProblemDetails.SetErrorKind errorKind
             |> ValueSome
 
-type GQLMessageException (msg) =
-    inherit GQLMessageExceptionBase (Execution, msg)
+type GQLMessageException (msg, [<Optional>] extensions) =
+    inherit GQLMessageExceptionBase (Execution, msg, extensions)
 
 type InvalidInputTypeException (msg, unmatchedOptionalFields) =
     inherit GQLMessageExceptionBase (InputCoercion, msg)