Upgrade: - bitcoin to v0.31.0 - miniscript to v11.0.0 Note: The bitcoin upgrade includes improvements to the `Transaction::weight()` function, it appears those guys did good, we no longer need to add the 2 additional weight units "just in case".
Disabled warnings for nursery/tmp_plan as it's going to be replaced anyways
This completes the move of things from https://github.com/LLFourn/bdk_core_staging
