pull mdal 1.2.0 from upstream

[uclaros]

Description

Update internal mdal version to 1.2.0

https://github.com/lutraconsulting/MDAL/releases/tag/release-1.2.0

[github-actions]

🪟 Windows builds ready!

Windows builds of this PR are available for testing here. Debug symbols for this build are available here.

(Built from commit 2e6cde2)

[nyalldawson]

Is the clang warning here a false positive?

[uclaros]

Is the clang warning here a false positive?

I believe yes, it doesn't like subtracting '0' from an integer in nodeType == w_id - '0'. I could change that to w_id - 48 and add a comment that 48 is ascii 0, but wouldn't do an mdal release for that!