WebKit macOS 11.0 Beta 4 to Beta 5 API Differences

WKScriptMessageHandlerWithReply.h
Modified -[WKScriptMessageHandlerWithReply userContentController:didReceiveScriptMessage:replyHandler:]
Declaration
From- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message replyHandler:(void (^)(id _Nonnull, NSString * _Nonnull))replyHandler
To- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message replyHandler:(void (^)(id _Nullable, NSString * _Nullable))replyHandler