Update MCUboot repo and branch
MCUboot was moved to mcu-tools org, and now uses "main" instead of
"master" branch.
@@ -110,8 +110,9 @@ repo.deps:
mcuboot:
type: github
- user: JuulLabs-OSS
+ user: mcu-tools
repo: mcuboot
+ branch: main
vers:
master: 0-dev
mynewt_1_7_0_tag: 1.3.1
