The following libraries (at least), should have new releases tagged (post re-organisation/namespace improvements) so they appear on packagist, bumps made in `mediawiki/core` and `mediawiki/vendor`.
[x] RunningStat : v1.1.0 -> v1.2.1
[x] IPSet : v1.1.0 -> v1.2.0
[x] RelPath : v2.0.0 -> v2.1.1
[x] WrappedString : v2.2.0 -> v2.3.0
[x] at-ease : v1.1.0 -> v1.2.0
[x] css-sanitizer : v1.0.2 -> v1.0.3
[x] php-session-serializer
Then we can update usages in MW core and extensions:
[x] RunningStat : [[ https://codesearch.wmflabs.org/search/?q=RunningStat%5C%5CRunningStat&i=nope&files=&repos= | code search ]]
[x] IPSet : [[ https://codesearch.wmflabs.org/search/?q=IPSet%5C%5CIPSet&i=nope&files=&repos= | code search ]]
[x] RelPath : [[ https://codesearch.wmflabs.org/search/?q=RelPath%5C%5CgetRelativePath&i=nope&files=&repos= | code search ]]
[x] WrappedString : [[ https://codesearch.wmflabs.org/search/?q=WrappedString%5C%5CWrappedString&i=nope&files=&repos= | code search ]]
[ ] at-ease : T187037
[x] css-sanitizer : Only used in TemplateStyles, upgraded in 252fb748457f651845300be39f60a6726d800cb9