Editor: update npm packages in trunk for 6.4.3.

Package Update includes fixes for:
- Image Block: Enable image block to be selected correctly when clicked.
- Reduce specificity of default Cover text color styles.
- Image Block: Fix deprecation when width/height attribute is number.
- Text selection: show CSS hack to Safari only.
- SlotFill: Allow contextual SlotFillProviders.

See: #5696
See: WordPress/gutenberg@bd6767b
See: WordPress/gutenberg#56043
See: WordPress/gutenberg#56411
See: WordPress/gutenberg#57063
See: WordPress/gutenberg#57300
See: WordPress/gutenberg#56779

Props mikachan, wildworks, alexstine, poena, isabel_brison, andrewserong, czapla, andraganescu, joen, ellatrix, youknowriad, ntsekouras.
Fixes #59943, #59943.



git-svn-id: https://develop.svn.wordpress.org/trunk@57258 602fd350-edb4-49c9-b593-d223f7449a82