In addition to all the packages being updated to the latest versions,
this commit also includes some mandatory changes to avoid editor breakage:
- Update React to to 18.2.0.
- Add the right stylesheets to support iframed block editors.
Props ntsekouras, mamaduka, flixos90, desrosj, peterwilsoncc.
See #57471.
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This updates PostCSS related dependencies for the main Core build process to versions that use the latest major version of PostCSS, 8.x.
There were no changes to any versioned CSS files as a result of this update directly. However, two occurrences of `-o-tab-size` have been removed due to the version of `caniuse-lite` used being updated in the process.
See #57554, #57555.
Built from https://develop.svn.wordpress.org/trunk@55150
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