* Upgrade to github.com/upper/db/v4
* fix(oonitest): repair imports after merge
Oops, okay, it seems the merge did not preserve all the import
changes, so let's ensure we use the right imports here!
* cleanup(go.mod): don't refer to upper.io/db/v3
These lines didn't disappear previously because the merge commit
failed to remove all references to upper.io/db/v3.
Co-authored-by: stergem <sgemelas@protonmail.com>
Co-authored-by: Simone Basso <bassosimone@gmail.com>
