Resolved a problem with building, chaged to fixed version of WebSockets

Author: dbambus

platformio.ini

@@ -22,7 +22,7 @@ monitor_filters = esp8266_exception_decoder
 lib_deps =
     makuna/NeoPixelBus@^2.7.6
     bblanchon/ArduinoJson@^6.17.2
-    links2004/WebSockets@^2.2.1
+    links2004/WebSockets@2.4.1
     adafruit/RTClib@^1.11.2
     knolleary/PubSubClient@^2.8.0
     https://github.com/tzapu/WiFiManager#v2.0.17