do not compile on c3 in vsc

[jovialcupid9-coder]

i cannot compile it on c3 in vsc using -std=gnu++17

no instance of overloaded function "AsyncWebServerRequest::beginResponse" matches the argument listC/C++(304)
AsyncWebSerial.cpp(33, 22): argument types are: (int, const char [10], const uint8_t [2311], unsigned long)
AsyncWebSerial.cpp(33, 22): object type is: AsyncWebServerRequest

'class AsyncWebSocketClient' has no member named 'setCloseClientOnQueueFull'
class "AsyncWebSocketClient" has no member "setCloseClientOnQueueFull"C/C++(135)

[forward2k]

Those errors come from an outdated ESPAsyncWebServer (e.g. me-no-dev), not from C3 or -std=gnu++17.

Please use the maintained forks: esp32async/AsyncTCP and esp32async/ESPAsyncWebServer (same as mathieucarbou, now under ESP32Async), then clean and rebuild.