There's a merged pull request on the void-packages repository

jrnl: add python3-packaging dependency
https://github.com/void-linux/void-packages/pull/26180

Description:
`jrnl` requires `python3-packaging` as of v2.4.5. Without it installed it will crash.

See the [changelog](https://github.com/jrnl-org/jrnl/blob/975e4ba7e25884f51fd93cc78e490c80ed8e19f7/CHANGELOG.md#v245-2020-07-31).