New Firmware Release Candidate v1.20.0

[danielm]

@iwahdan
Thanks a lot for new release candidate.

I am testing with code provided earlier this week:
https://drive.google.com/open?id=1JwP1Pc3V78X2dhKK3qF_Hh-XGWKdzZqP

LTE object fails to init (application hangs) after soft-reset. It does not happen every time but very often.