`codal` upstream repo patches not applied in `microbit-v2-samples`

[microbit-carlos]

In case we might need to consider any of these (unlikely, but I'm looking at microbit patches missing in lancaster/codal, so creating this list was no extra effort):

• Add pre-process task
  • https://github.com/lancaster-university/codal/pull/44/files
• Account for main being used instead of master in lock code
  • lancaster-university/codal@0b2a37c
• add makeable target & update codal-makeable branch name
  • lancaster-university/codal@595b27a
  • lancaster-university/codal@a18ad20
• add codal-microbit-v2 to targets.json
  • lancaster-university/codal@e9e2035
• Allow for additional "libraries": [] in codal.json
  • lancaster-university/codal@13110e9
• Update uf2conv.py to python3 version
  • lancaster-university/codal@6d66102
• Update comments in merge_hex.py
  • lancaster-university/codal@9171e30