gallery-dl: Update to 1.18.2

Changes:
1.18.2
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### Additions
- [bbc] add `gallery` and `programme` extractors
- [comicvine] add extractor
- [kemonoparty] add `max-posts` option
- [kemonoparty] parse `o` query parameters
- [mastodon] add `reblogs` and `replies` options
- [pixiv] add extractor for `pixivision` articles
- [ytdl] add experimental extractor for sites supported by youtube-dl
- extend `parent-metadata` functionality
- add `archive-prefix` option
- add `url-metadata` option

### Changes
- [kemonoparty] skip duplicated patreon files
- [mangadex] use custom User-Agent header

### Fixes
- [hitomi] fix image URLs
- [imagevenue] fix extraction
- [instagram] fix extraction of `/explore/tags/` posts
- [moebooru] fix `tags` ending with a `+` when logged in
- [naverwebtoon] fix comic extraction
- [pururin] update domain and fix extraction
- [vk] improve metadata extraction and URL pattern
- [downloader:ytdl] fix `outtmpl` setting for yt-dlp

(leot)