* The importer list have a Hook
Previously, add-on 175027074 simply edited the list once. It became impossible
since the list became a function. Hence I need a filter to add the list here.
@kelciour (nice to meet you by the way), you may be interested by it too (at
least if I believe efb1ce46d4 )
I would have preferred to use `anki.importing.base.Importer` instead of
`Any`. However, this leads to
> Name "anki.importing.base.Importer" is not defined [name-defined]
when I run test.
Helps to solve this would be welcomed
* mention the hook may not last too long (dae)
08ad9f33b9