Log Message:
gallery-dl: Update to 1.17.2

Changes:
1.17.2
------
### Additions
- [deviantart] add support for posts from watched users (#794)
- [manganelo] add `chapter` and `manga` extractors (#1415)
- [pinterest] add `search` extractor (#1411)
- [sankaku] add `tag_string` metadata field (#1388)
- [sankaku] add enumeration index for books (#1388)
- [tapas] add `series` and `episode` extractors (#692)
- [tapas] implement login with username & password (#692)
- [twitter] allow specifying a custom format for user results (#1337)
- [twitter] add extractor for direct image links (#1417)
- [vk] add support for albums (#474)

### Fixes
- [aryion] unescape paths (#1414)
- [bcy] improve pagination
- [deviantart] update `watch` URL pattern (#794)
- [deviantart] fix arguments for search/popular results (#1408)
- [deviantart] use fallback for `/intermediary/` URLs
- [exhentai] improve and simplify image limit checks
- [komikcast] fix extraction
- [pixiv] fix `favorite` URL pattern (#1405)
- [sankaku] simplify `pool` tags (#1388)
- [twitter] improve error message when trying to log in with 2FA (#1409)
- [twitter] don't use youtube-dl for cards when videos are disabled (#1416)