SVGO has been updated to new major version 2.x after some time without any updates.
It needs to be switched to JS configuration.
First exemplary configuration [[ https://gerrit.wikimedia.org/r/c/mediawiki/skins/Vector/+/674926 | is in Vector ]].
[[https://codesearch.wmcloud.org/deployed/?q=grunt-svgmin&i=nope&files=package%5C.json&excludeFiles=&repos=|Production uses]]:
[ ] MediaWiki - https://gerrit.wikimedia.org/r/c/mediawiki/core/+/692591
[ ] CentralNotice - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CentralNotice/+/692455
[x] ~~Cite~~ No SVGs part of extension anymore. Instead removed grunt-svgmin package
[ ] Echo - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Echo/+/692450
[x] GuidedTour - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GuidedTour/+/681944
[ ] Kartographer - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Kartographer/+/692446
[x] MultimediaViewer - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/MultimediaViewer/+/678635
[x] MobileFrontend - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/MobileFrontend/+/678403
[x] Popups ("Page Previews") - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Popups/+/681760
[x] RevisionSlider - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/RevisionSlider/+/692458
[x] TwoColConflict - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/TwoColConflict/+/692580
[ ] UniversalLanguageSelector - https://gerrit.wikimedia.org/r/c/mediawiki/extensions/UniversalLanguageSelector/+/692584/
[x] MinervaNeue - https://gerrit.wikimedia.org/r/c/mediawiki/skins/MinervaNeue/+/678637
[ ] MonoBook
[ ] Timeless
[x] Vector – https://gerrit.wikimedia.org/r/c/mediawiki/skins/Vector/+/674926
[] Wikimedia Design Style Guide