Update postcss* to latest releases

Problem/Motivation

Update all postcss-related javascript dependencies to their latest releases.

Steps to reproduce

$ yarn upgrade-interactive

Proposed resolution

? Pick the packages you want to upgrade.         Current          Range       Latest
 postcss-preset-env -------------------------- ◯ ^9.6.0 -------             ◉ ^10.1.1
 postcss ------------------------------------- ◯ ^8.4.40 ------ ◉ ^8.4.49

Remaining tasks

Backport this to the gazillion current branches, TBD by the core committers.

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet