Remove `ckeditor5-premium-features` from `peerDependencies`

[filipsobol]

Suggested merge commit message (convention)

Fix: Improve ESM support by adding missing file extensions in imports.

Other: Remove ckeditor5-premium-features from peerDependencies.

Internal: Remove ckeditor5-premium-features from devDependencies.

[coveralls]

Pull Request Test Coverage Report for Build 3d164570-11b2-435c-9863-c58cc4cb8283

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file 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 358d9d5a-7ae0-47fd-bec0-4fc4b4e10d2e:	0.0%
Covered Lines:	582
Relevant Lines:	582

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💛 - Coveralls