Use dynamic imports to fix issues in the release process

[pomek]

Suggested merge commit message (convention)

Internal: Use dynamic imports to fix issues in the release process. Closes #607.

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Additional information

For example – encountered issues, assumptions you had to make, other affected tickets, etc.

[pomek]

rm -rf release/; yarn release:prepare-packages; cat release/ckeditor5-react/package.json | grep version
yarn run v1.22.19
$ node ./scripts/preparepackages.js
✔ Verifying the repository.
✔ Updating the `#version` field.
✔ Running build command.
✔ Creating the `ckeditor5-react` package in the release directory.
✔ Cleaning-up.
✔ Commit & tag.
Done in 3.99s.
  "version": "11.0.0-alpha.0",

[coveralls]

Pull Request Test Coverage Report for Build 6b788b65-a374-44d3-aee2-e944650e685d

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 c95c4b49-ff87-4c9a-83ad-f5fa96594e3f:	0.0%
Covered Lines:	597
Relevant Lines:	597

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💛 - Coveralls