chore: mark as ready for Svelte 4

Author: dummdidumm

package.json

@@ -104,7 +104,7 @@
     "sass": "^1.26.8",
     "stylus": "^0.55.0",
     "sugarss": "^2.0.0 || ^3.0.0 || ^4.0.0",
-    "svelte": "^3.23.0",
+    "svelte": "^3.23.0 || ^4.0.0-next.0 || ^4.0.0",
     "typescript": ">=3.9.5 || ^4.0.0 || ^5.0.0"
   },
   "peerDependenciesMeta": {