v2.1.4
DOC: migrate from sphinx-panels to sphinx-design (#46227)
TST: Use pytest or assert_produces_warnings instead of catch_warnings (#54390)
Backport PR #55275 on branch 2.1.x (Update pyproject.toml - replace `output_formatting` with `output-formatting`) (#55291)
Backport PR #54838 on branch 2.1.x (Don't expose EA.pad_or_backfill to users + switch to DeprecationWarning) (#54851)
Backport PR #55427 on branch 2.1.x (DOC: Remove outdated docs about NumPy's broadcasting) (#55896)
Backport PR #56393 on branch 2.1.x (DOC: Add release date for 2.1.4) (#56395)
STY: Enable ruff perflint (#54236)