chore: bump happy-dom from 18.0.1 to 20.0.0

Bumps [happy-dom](https://github.com/capricorn86/happy-dom) from 18.0.1 to 20.0.0.
- [Release notes](https://github.com/capricorn86/happy-dom/releases)
- [Commits](capricorn86/happy-dom@v18.0.1...v20.0.0)

---
updated-dependencies:
- dependency-name: happy-dom
  dependency-version: 20.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -58,7 +58,7 @@
     "@changesets/cli": "^2.26.2",
     "@vitest/coverage-v8": "^3.2.4",
     "genversion": "^3.1.1",
-    "happy-dom": "^18.0.1",
+    "happy-dom": "^20.0.0",
     "lerna-update-wizard": "^1.1.2",
     "rimraf": "^6.0.0",
     "tslib": "^2.6.1",

packages/utils/observable/package.json

@@ -77,7 +77,7 @@
     "@testing-library/react": "^16.0.0",
     "@types/react": "^18.2.50",
     "@types/uuid": "^11.0.0",
-    "happy-dom": "^18.0.1",
+    "happy-dom": "^20.0.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "typescript": "^5.8.2",