Bump happy-dom from 15.11.7 to 20.9.0

Bumps [happy-dom](https://github.com/capricorn86/happy-dom) from 15.11.7 to 20.9.0.
- [Release notes](https://github.com/capricorn86/happy-dom/releases)
- [Commits](capricorn86/happy-dom@v15.11.7...v20.9.0)

---
updated-dependencies:
- dependency-name: happy-dom
  dependency-version: 20.9.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -29,7 +29,7 @@
         "eslint-plugin-vue": "^10.4.0",
         "file-loader": "^6.2.0",
         "fork-ts-checker-webpack-plugin": "^9.0.2",
-        "happy-dom": "^15.11.6",
+        "happy-dom": "^20.9.0",
         "jiti": "^2.5.1",
         "less": "^4.2.0",
         "less-loader": "^12.2.0",