v1.21.1

Additions

• [gofile] add gofile.io extractor (#2364)
• [instagram] add previews option (#2135)
• [kemonoparty] add duplicates option (#2440)
• [pinterest] add extractor for created pins (#2452)
• [pinterest] support multiple files per pin (#1619, #2452)
• [telegraph] Add telegra.ph extractor (#2312)
• [twitter] add syndication option (#2354)
• [twitter] accept fxtwitter.com URLs (#2484)
• [downloader:http] support using an arbitrary method and sending POST data (#2433)
• [postprocessor:metadata] implement archive options (#2421)
• [postprocessor:ugoira] add mtime option (#2307)
• [postprocessor:ugoira] support setting timecodes with mkvmerge (#1550)
• [formatter] support evaluating f-string literals
• add --ugoira-conv-copy command-line option (#1550)
• implement a contains() function for filter statements (#2446)

Fixes

• [aryion] provide correct date metadata independent of DST
• [furaffinity] fix search result pagination (#2402)
• [hitomi] update and fix metadata extraction (#2444)
• [kissgoddess] extract all images (#2473)
• [mangasee] unescape manga names (#2454)
• [newgrounds] update and fix pagination (#2456)
• [newgrounds] warn about age-restricted posts (#2456)
• [pinterest] do not force m3u8_native for video downloads (#2436)
• [twibooru] fix posts without name (#2434)
• [unsplash] replace dash with space in search API queries (#2429)
• [postprocessor:mtime] fix timestamps from datetime objects (#2307)
• fix yet another bug in _check_cookies() (#2372)
• fix loading/storing cookies without domain