Raise version and update ReadMe

README.md

 # TFT_eSPI
 
-An Arduino IDE compatible graphics and fonts library for ESP8266 and ESP32 processors with a driver for ILI9341, ILI9163, ST7735, S6D02A1, ILI9481, ILI9486 and HX8357 based TFT displays that support SPI.
+An Arduino IDE compatible graphics and fonts library for ESP8266 and ESP32 processors with a driver for ILI9341, ILI9163, ST7735, S6D02A1, ILI9481, ILI9486, HX8357D and ST7789 based TFT displays that support SPI.
 
 8 bit parallel interface TFTs  (e.g. UNO format mcufriend shields) can used with an ESP32. The ILI9488 is supported in 8 bit parallel mode.
 

library.json

 {
   "name": "TFT_eSPI",
-  "version": "0.20.14",
-  "keywords": "tft, ePaper, display, ESP8266, NodeMCU, ESP32, M5Stack, ILI9341, ST7735, ILI9163, S6D02A1, ILI9486",
+  "version": "0.20.15",
+  "keywords": "tft, ePaper, display, ESP8266, NodeMCU, ESP32, M5Stack, ILI9341, ST7735, ILI9163, S6D02A1, ILI9486, ST7789",
   "description": "A TFT and ePaper SPI graphics library for ESP8266 and ESP32",
   "repository":
   {

library.properties

 name=TFT_eSPI
-version=0.20.14
+version=0.20.15
 author=Bodmer
 maintainer=Bodmer
 sentence=A fast TFT library for ESP8266 processors and the Arduino IDE