Update explicit dependencies

[goanpeca]

Hi @thorstenwagner 👋🏼

In working on conda-forge/napari-boxmanager-feedstock#5 I noticed that some packages that are being used explicitly (import package) are not being listed as dependencies of the package. It still works as napari is bringing these deps, but that may not be always the case, plus we should list all dependencies we rely on explicitly.

The packages are:
- qtpy
- scipy
- tifffile
- tqdm

Could you update this for a future release?

Thanks 🙌🏼

[thorstenwagner]

I will have a look! Thanks for letting me know.

[thorstenwagner]

Done :-)