chore(deps): update dependency happy-dom to v20 [security]

Author: renovate[bot]

e2e/dom/fixtures/package.json

@@ -19,7 +19,7 @@
     "@testing-library/react": "^16.3.0",
     "@types/react": "^19.1.13",
     "@types/react-dom": "^19.1.9",
-    "happy-dom": "^18.0.1",
+    "happy-dom": "^20.0.0",
     "jsdom": "^26.1.0",
     "typescript": "^5.9.2"
   }

packages/core/package.json

@@ -75,7 +75,7 @@
     "@types/picomatch": "^4.0.2",
     "cac": "^6.7.14",
     "chokidar": "^4.0.3",
-    "happy-dom": "^18.0.1",
+    "happy-dom": "^20.0.0",
     "jest-diff": "^30.1.2",
     "jsdom": "^26.1.0",
     "license-webpack-plugin": "^4.0.2",