Aligned to `ckeditor5-dev` ESM changes

[psmyrek]

Suggested merge commit message (convention)

Internal: Aligned to ckeditor5-dev ESM changes.

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Additional information

This PR requires https://github.com/ckeditor/ckeditor5-dev/pull/1011 to be released. When it is released, all ckeditor5-dev-* packages need to be bumped in this repository.

[coveralls]

Pull Request Test Coverage Report for Build f01eb93c-0472-4d2c-ad3e-e818b2e0ccb3

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 743f1732-1a9c-4eea-85b0-300aa9e6ce9c:	0.0%
Covered Lines:	584
Relevant Lines:	584

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💛 - Coveralls

[pomek]

I hope we will be able to remove the resolutions key, too: https://github.com/ckeditor/ckeditor5-react/blob/cdf5a75f9d6e2cc8f115cef7a67d5b59a1f53ec1/package.json#L77-L82