gallery-dl: Update to 1.15.1

Changes:
1.15.1
------
### Additions
- [hentaicafe] add `manga_id` metadata field (#1036)
- [hentaifoundry] add support for stories (#734)
- [hentaifoundry] add `include` option
- [newgrounds] extract image embeds (#1033)
- [nijie] add `include` option (#1018)
- [reactor] match URLs without subdomain (#1053)
- [twitter] extend `retweets` option (#1026)
- [weasyl] add extractors (#977)

### Fixes
- [500px] update query hashes
- [behance] fix `collection` extraction
- [newgrounds] fix video extraction (#1042)
- [twitter] improve twitpic extraction (#1019)
- [weibo] handle posts with more than 9 images (#926)
- [xvideos] fix `title` extraction
- fix crash when using `--download-archive` with `--no-skip` (#1023)
- fix issues with `blacklist`/`whitelist` defaults (#1051, #1056)

### Removals
- [kissmanga] remove module

(leot)