SoftwareSerial: update to 3.2.3 (#3239)
SoftwareSerial: update to 3.2.3 (#3239)

Adam5Wu/Arduino,jes/Arduino,jes/Arduino,sticilface/Arduino,Juppit/Arduino,hallard/Arduino,wemos/Arduino,jes/Arduino,lrmoreno007/Arduino,hallard/Arduino,esp8266/Arduino,lrmoreno007/Arduino,lrmoreno007/Arduino,Lan-Hekary/Arduino,Juppit/Arduino,me-no-dev/Arduino,sticilface/Arduino,me-no-dev/Arduino,sticilface/Arduino,esp8266/Arduino,hallard/Arduino,wemos/Arduino,sticilface/Arduino,hallard/Arduino,esp8266/Arduino,lrmoreno007/Arduino,Lan-Hekary/Arduino,Lan-Hekary/Arduino,wemos/Arduino,jes/Arduino,lrmoreno007/Arduino,Adam5Wu/Arduino,me-no-dev/Arduino,sticilface/Arduino,Juppit/Arduino,Lan-Hekary/Arduino,me-no-dev/Arduino,me-no-dev/Arduino,Juppit/Arduino,Juppit/Arduino,esp8266/Arduino,Adam5Wu/Arduino,Lan-Hekary/Arduino,jes/Arduino,hallard/Arduino,Adam5Wu/Arduino,esp8266/Arduino,Adam5Wu/Arduino,wemos/Arduino,wemos/Arduino