New review comment by Eloitor on void-packages repository

https://github.com/void-linux/void-packages/pull/38129#discussion_r923860438

Comment:
In the `setup.cfg` file I found this
```
tests_require =
  pytest-cov
  pytest-flake8
  pytest-isort
  pytest-runner
```
I added the first 2 as `checkdepends`, but I didn't find the other two in the repo.