chore(deps): allow react 19

Author: sjwall

lib/package.json

@@ -46,7 +46,7 @@
   ],
   "peerDependencies": {
     "mermaid": ">=8.11.0",
-    "react": "^16.8.4 || ^17.0.0 || ^18.0.0",
+    "react": "^16.8.4 || ^17.0.0 || ^18.0.0 || ^19.0.0",
     "unist-util-visit": "^4.1.0"
   },
   "optionalDependencies": {