ICACHE_RAM_ATTR attribute

[D-G-L]

Dear Scott,
in a Project I discovererd that the above Parameter for Interupts is missing in your library (EspSoftSerialRx.cpp).
That results in errors like: ISR not in IRam when program start to run (here: Featherwing Huzzah esp 8266 board).
The programm will compile and run when using an old esp8266 (max 2.50) board driver in Board manager.
But not in current Version 3.02
Tks for your help
Our Project:
https://forum.arduino.cc/t/error-at-example-program-wi-fi-and-oled-upgrade-for-mightyohm-geiger-counter/976201/13

Tks for your help