chore(deps): update dependency svelte to v4 [security]

Author: renovate[bot]

demos/package-lock.json

@@ -30,7 +30,7 @@
     "react": "^18.0.0",
     "react-dom": "^18.0.0",
     "sass": "^1.49.7",
-    "svelte": "^3.48.0",
+    "svelte": "^4.0.0",
     "tailwindcss": "^2.2.19",
     "typescript": "^4.5.5",
     "uuid": "^8.3.2",