Khoi Hoang

1. Add support to [arduino-pico core](https://github.com/earlephilhower/arduino-pico) 2. Update `library.properties`

Supporting case-insensitive headers

2

Supporting case-insensitive headers, according to **RFC2616**, as requested in [**Make headers case-insensitive** #105](https://github.com/gilmaimon/ArduinoWebsockets/issues/105)

[Feature Request] Port these libraries lwIP_w5100, lwIP_w5500 and lwIP_enc28j60 from ESP8266

12

Hi @earlephilhower As you've done so great work for lwIP_CYW43, lwIP_Ethenet and cyw43 WiFi libraries, could you please, when having time, port these libraries : 1. [**lwIP_w5100**](https://github.com/esp8266/Arduino/tree/master/libraries/lwIP_w5100) 2. [**lwIP_w5500**](https://github.com/esp8266/Arduino/tree/master/libraries/lwIP_w5500) 3....

Fix compiler error for ESP32-C3 and mbed TLS v2.7.0+

13

Compile error on ESP32-C3 for even simplest example [simple_server](https://github.com/me-no-dev/ESPAsyncWebServer/tree/master/examples/simple_server) ``` /home/kh/Arduino/libraries/ESPAsyncWebServer-master/src/AsyncWebSocket.cpp: In member function 'IPAddress AsyncWebSocketClient::remoteIP()': /home/kh/Arduino/libraries/ESPAsyncWebServer-master/src/AsyncWebSocket.cpp:843:28: error: call of overloaded 'IPAddress(unsigned int)' is ambiguous return IPAddress(0U); ^ ```