chore: update happy dom deps version

[Minh141120]

This pull request updates a development dependency in the core/package.json file to keep the project up-to-date and compatible with the latest features and fixes.

Dependency updates:

• Upgraded the happy-dom package from version ^15.11.6 to ^20.0.0 to ensure compatibility with the latest improvements and bug fixes.

[Copilot]

Pull Request Overview

Updates the happy-dom development dependency from version ^15.11.6 to ^20.0.0 to incorporate latest improvements and bug fixes.

• Upgraded happy-dom package to version ^20.0.0

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[github-actions]

Barecheck - Code coverage report

Total: 29.73%

Your code coverage diff: 0.00% ▴

✅ All code changes are covered

[Copilot]

Pull Request Overview

Copilot reviewed 1 out of 3 changed files in this pull request and generated no new comments.

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[louis-jan]

LGTM

[Copilot]

Pull Request Overview

Copilot reviewed 1 out of 2 changed files in this pull request and generated no new comments.

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