fish-shell 2021-08-14

• [2021-08-14 18:30:30 +0900]: CHANGELOG
• [2021-08-14 18:29:22 +0900]: commandline: Add --is-valid option (#8142)
• [2021-08-14 17:58:54 +0900]: CHANGELOG set -q change
• [2021-08-14 09:07:59 +0900]: completion: support --no prefixes for mpv flag options