youtube-dl 2021.04.07

Core

• [extractor/common] Use compat_cookies_SimpleCookie for _get_cookies

• [compat] Introduce compat_cookies_SimpleCookie

• [extractor/common] Improve JSON-LD author extraction
• [extractor/common] Fix _get_cookies on python 2 (#20673, #23256, #20326,
  #28640)

Extractors

• [youtube] Fix extraction of videos with restricted location (#28685)

• [line] Add support for live.line.me (#17205, #28658)

• [vimeo] Improve extraction (#28591)
• [youku] Update ccode (#17852, #28447, #28460, #28648)
• [youtube] Prefer direct entry metadata over entry metadata from playlist
  (#28619, #28636)
• [screencastomatic] Fix extraction (#11976, #24489)

• [palcomp3] Add support for palcomp3.com (#13120)
• [arnes] Add support for video.arnes.si (#28483)
• [youtube:tab] Add support for hashtags (#28308)