v0.12.6

Thermodynamics v0.12.6

Diff since v0.12.5

Merged pull requests:

• Add capability for user-defined parameter sets, with an example (take 2) (#210) (@glwagner)
• Bump patch version to capture #210 (#211) (@glwagner)
• Update climacommon to 2024_03_18 (#212) (@Sbozzolo)