--deps contains an incomplete list of optional dependencies

### Describe the bug
copyparty will print out optional dependencies on startup, but it seems to be missing a couple.

relevant output when running with `--deps` flag:
```
dependencies found: sqlite (sessions and file/media indexing)
dependencies found: pillow (image thumbnails (plenty fast))
dependencies found: vips (image thumbnails (faster, eats more ram))
dependencies found: pillow-webp (create thumbnails as webp files)
dependencies found: ffmpeg (transcode audio, create spectrograms, video thumbnails, good-but-slow image thumbnails)
dependencies found: ffprobe (transcode audio, create spectrograms, video thumbnails, read audio/media tags)
dependencies found: mutagen (read audio tags (ffprobe is better but slower))
dependencies found: argon2 (secure password hashing (advanced users only))
dependencies found: pyzmq (send zeromq messages from event-hooks)
dependencies missing: pillow-heif (read .heif images with pillow (rarely useful))
dependencies found: pillow-avif (read .avif images with pillow (rarely useful))
```

### To Reproduce
Run `copyparty --deps`.

### Expected behavior
I believe it should at least also contain `pyftpdlib`, `partftpy`, `magic`, `impacket`, `pyopenssl`, `cfssl`.