Add conversion methods and other fixes for Dual numbers

[dennisYatunin]

This is a followup to #199, with some additional fixes for supporting Dual numbers in ClimaAtmos. Specifically, this PR adds methods for converting a ThermodynamicState{<:AbstractFloat} to a ThermodynamicState{<:Dual}, and it removes the requirement that the solution tolerance of saturation adjustment must have the same type as the input quantities. It also fixes a typo in the PhaseDry_ρT constructor and bumps the minor version number.

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (c54e008) 90.98% compared to head (bc86a88) 91.00%.

Files	Patch %	Lines
src/states.jl	80.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #200 +/- ## ========================================== + Coverage 90.98% 91.00% +0.02% ========================================== Files 10 10 Lines 1176 1179 +3 ========================================== + Hits 1070 1073 +3 Misses 106 106 ```

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