Use Tasmota stage, core 2.7.4.2

core 2.7.4.2 includes some backports from arduino / master
esp8266/Arduino#7547
esp8266/Arduino#7586
esp8266/Arduino#7585
esp8266/Arduino#7595

Author: Jason2866

platformio_override_sample.ini

@@ -88,7 +88,7 @@ extra_scripts             = ${scripts_defaults.extra_scripts}
 [tasmota_stage]
 ; *** Esp8266 core for Arduino version Tasmota stage
 platform                  = [email protected]
-platform_packages         = jason2866/framework-arduinoespressif8266
+platform_packages         = framework-arduinoespressif8266@https://github.com/Jason2866/Arduino.git#2.7.4.2
 build_unflags             = ${esp_defaults.build_unflags}
 build_flags               = ${esp82xx_defaults.build_flags}