Release Name: Bug Fix: ML CI calculation - allow nuisance parameters to vary (v2.2.1)

Notes:
## What''s Changed
**Bug Fixes:**
- amd update NIFTI functions by @dmysmith in [10eaa08](https://github.com/cmig-research-group/c...)
- ML CI calculation: allow nuisance parameters to vary by @dmysmith in [b92e7b4](https://github.com/cmig-research-group/c...)
- amd update output to json for DEAP by @dmysmith in [b1120ae](https://github.com/cmig-research-group/c... ... see more