v1.1.1

### New Release v1.1.1

1. Add support to PROGMEM-related commands, such as sendContent_P() and send_P().
2. Update Platform.ini to support PlatformIO 5.x owner-based dependency declaration.
3. Clean up code. Use FlashString and related functions extensively in code as well in examples.
4. Enhance examples.

Author: khoih-prog

README.md

@@ -1113,9 +1113,9 @@ Connection: close
 
 ### Screen Shots
 
-#### 1. Seeeduino SEEED_XIAO_M0
+#### 1. SAMD51 Itsy-Bitsy M4
 
-This is the screen shot when running example [AdvancedWebServer](https://github.com/khoih-prog/ESP8266_AT_WebServer/tree/master/examples/AdvancedWebServer) on **Seeeduino SEEED_XIAO_M0** board using this [ESP8266_AT_WebServer Library](https://github.com/khoih-prog/ESP8266_AT_WebServer)
+This is the screen shot when running example [AdvancedWebServer](https://github.com/khoih-prog/ESP8266_AT_WebServer/tree/master/examples/AdvancedWebServer) on **Adafruit SAMD51 Itsy-Bitsy M4** board using this [ESP8266_AT_WebServer Library](https://github.com/khoih-prog/ESP8266_AT_WebServer)
 
 <p align="center">
     <img src="https://github.com/khoih-prog/ESP8266_AT_WebServer/blob/master/pics/AdvancedWebServer.png">
@@ -1265,7 +1265,7 @@ The library supports:
 
 1. Based on and modified [Ivan Grokhotkov's ESP8266WebServer](https://github.com/esp8266/Arduino/tree/master/libraries/ESP8266WebServer)
 2. Based on and modified from [bportaluri's WiFiEsp library](https://github.com/bportaluri/WiFiEsp)
-3. Thanks to good work of [Miguel Alexandre Wisintainer](https://github.com/tcpipchip) for initiating, inspriring, working with, developing, debugging and testing. Without that, support to nRF52, especially **U-Blox B302 running as nRF52840 and U-Blox B112 running as nRF52832**, has never been started and finished. Also see [ESP32-based U-BLOX NINA W102 running ENC28J60](https://u-blox-ethernet-ninaw.blogspot.com/).
+3. Thanks to good work of [Miguel Alexandre Wisintainer](https://github.com/tcpipchip) for initiating, inspriring, working with, developing, debugging and testing. Without that, support to nRF52, especially **U-Blox B302 running as nRF52840 and U-Blox B112 running as nRF52832**, has never been started and finished. Also see [U-BLOX NINA B302/ENC28J60 wth Alexa/SinricPro](https://u-blox-ethernet-ninaw.blogspot.com/).
 
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