New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/26398#issuecomment-730118857

Comment:
Do you think you could add all the necessary `checkdepends` so we don't get any warnings like the one below:

```
WARNING: The pip package is not available, falling back to EasyInstall for handling setup_requires/test_requires; this is deprecated and will be removed in a future version. 
```

Build with `./xbps-src -Q pkg jrnl` to check.