Upgrade React peer dep to 19

Author: bendera

packages/lib/package.json

@@ -28,6 +28,7 @@
     "@vscode-elements/elements": "^1.15.0"
   },
   "peerDependencies": {
-    "react": "^18.0.0"
+    "react": "17 || 18 || 19",
+    "react-dom": "17 || 18 || 19"
   }
 }