fix: update package.json to support react 19 (#341)

Run the test to see what's going on first and see do we need to adopt
changes in tests supplied by the developer communities.

Author: louis-launchdarkly

package.json

@@ -89,7 +89,7 @@
     "lodash.camelcase": "^4.3.0"
   },
   "peerDependencies": {
-    "react": "^16.6.3 || ^17.0.0 || ^18.0.0",
-    "react-dom": "^16.8.4 || ^17.0.0 || ^18.0.0"
+    "react": "^16.6.3 || ^17.0.0 || ^18.0.0 || ^19.0.0",
+    "react-dom": "^16.8.4 || ^17.0.0 || ^18.0.0 || ^19.0.0"
   }
 }