Merge branch 'develop' into 'master'

Battery voltage

See merge request caspermeijn/klok!29

Merge branch 'battery' into 'master'

Battery

See merge request caspermeijn/klok!22

Merge branch 'optimized_build' into 'master'

Optimized build

Closes #33

See merge request caspermeijn/klok!18

Merge branch 'flash_fcb2' into 'master'

fix: Use FCB2 to prevent crashes due to corrupt flash

See merge request caspermeijn/klok!17

Merge branch 'newt_version' into 'master'

fix: Use mynewt-core with log fixes

See merge request caspermeijn/klok!16

Merge branch 'docs_upgrade' into 'master'

Docs upgrade

Closes #35 and #32

See merge request caspermeijn/klok!15

Merge branch 'ci' into 'master'

ci: Add manual release job

See merge request caspermeijn/klok!9

rust-fmt