Caribou-hi

What's Changed
* Implement `EmissionAbsorptionMismatchedModel` by tvwenger in https://github.com/tvwenger/caribou_hi/pull/10


**Full Changelog**: https://github.com/tvwenger/caribou_hi/compare/v1.2.0...v1.3.0

- updates default `bg_temp` to 3.77 K
- Updates caribou_hi to bayes_spec>=1.7.0
- Reparameterizes model in terms of pressure and depth
- Changes size-linewidth and n_alpha parameters from cloud-based to hyper parameters
- Removes constant noise assumption from emission + absorption models
- Observed absorption spectra are now 1 - exp(-tau) instead of tau
- Uniform prior on filling factor

- updates indexing in `radiative_transfer` to support >2-D data

- Support for beam dilution (filling factor)
- Adds new model `EmissionAbsorptionFFModel`

Initial release of `caribou_hi` in the `bayes_spec` framework.