0.1.4:
  - cap the main battery discharge at 20% while the keyboard has power

0.1.3:
  - try to keep the cell voltage roughly in sync

0.1.2:
  - port to the OG pinephone

0.1.1:
  - adjust for new kernel semantics in 5.16.10, should be backwards compatible

0.1.0:
  - initial release
