Backspace key sends [DEL](127) instead of [BACKSPACE](8)

[Kalsifer-742]

I'm writing a serial CLI for stm32.
While debugging the code i noticed the thing i stated in the title.
I tried to do the same thing with minicom and the correct code was being sent.
I think there might be some bug in picocom.
Let me know if i can provide some needed informations.
Thank you.