gallery-dl: Update to 1.17.1

Changes:
1.17.1
------
### Additions
- [architizer] add `project` and `firm` extractors (#1369)
- [deviantart] add `watch` extractor (#794)
- [exhentai] support `/tag/` URLs (#1363)
- [gelbooru_v01] support `drawfriends.booru.org`, `vidyart.booru.org`, and
  `tlb.booru.org` by default
- [nozomi] support `/index-N.html` URLs (#1365)
- [philomena] add generalized extractors for philomena sites (#1379)
- [philomena] support post URLs without `/images/`
- [twitter] implement `users` option (#1337)
- implement `parent-metadata` option (#1364)

### Changes
- [deviantart] revert previous changes to `extra` option (#1356, #1387)

### Fixes
- [exhentai] improve favorites count extraction (#1360)
- [gelbooru] update domain for video downloads (#1368)
- [hentaifox] improve image and metadata extraction (#1366, #1378)
- [imgur] fix and improve rate limit handling (#1386)
- [weasyl] improve favorites URL pattern (#1374)
- use type check before applying `browser` option (#1358)
- ensure `-s/--simulate` always prints filenames (#1360)

### Removals
- [hentaicafe]  remove module
- [hentainexus] remove module
- [mangareader] remove module
- [mangastream] remove module

(leot)