Add latent_heat function and bump patch release

[tapios]

• Adds a generic latent_heat function that takes humidities as input to compute the correct LH over a mixture
• Moves the existing latent heat functions to air_saturation_functions.jl because where they were before (air_properties.jl) was included before the liquid_fraction functions, meaning we couldn't use liquid_fraction in the latent heat functions where they were before.
• Bumps patch release

[szy21]

Thanks!

[codecov]

Codecov Report

❌ Patch coverage is 96.96970% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 87.37%. Comparing base (f83cbe4) to head (14ad119).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/air_saturation_functions.jl	96.96%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #304      +/-   ##
==========================================
+ Coverage   87.30%   87.37%   +0.06%     
==========================================
  Files          22       22              
  Lines        1150     1156       +6     
==========================================
+ Hits         1004     1010       +6     
  Misses        146      146              

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