~/.cache/papis is not refreshed on import

[mcepl]

This is the follow-up on #31:

Yeah, I'm afraid the SQLite importer just writes out the info.yaml files and doesn't let papis known it needs to update the database :\

When the import from SQLite happens, the cache in ~/.cache/papis/ is not updated and papis list (and other commands) produces non-sensical results.

[kiike]

Since we are now importing via the papis API, #43, I believe this is already addressed.

[alexfikl]

Agreed. Feel free to re-open or open a new issue if there are still a bug here!