1.12.4

What's Changed

• Retain volatile optional pcb settings by @bagbag in #243
• Update heatpump models by @bagbag in #241
• Use a dictionary instead of repeating values for smart grid mode by @bagbag in #242
• 💬 Improve warning by @kamaradclimber in #244

Full Changelog: 1.12.1...1.12.4