fish-shell 2022-01-04

• [2022-01-04 23:35:43 +0900]: Revert "Work on CHANGELOG for 3.4 (#8601)"
• [2022-01-04 13:23:14 +0900]: Fix xargs option completions
• [2022-01-04 02:58:56 +0900]: Work on CHANGELOG for 3.4 (#8601)
• [2022-01-04 01:08:41 +0900]: Revert "Update Mac.cmake"
• [2022-01-04 00:43:05 +0900]: CHANGELOG: work on 3.4.0
• [2022-01-04 00:03:29 +0900]: funcsave: add documentation for feature added in 3a402b19b