chore(deps): update react monorepo to v19

Author: renovate-bot

example/package.json

@@ -16,7 +16,7 @@
     "expo-document-picker": "13.0.1",
     "expo-splash-screen": "0.29.18",
     "lodash": "4.17.21",
-    "react": "18.3.1",
+    "react": "19.0.0",
     "react-native": "0.76.3",
     "react-native-ble-plx": "3.2.1",
     "react-native-toast-message": "2.2.1"
@@ -25,7 +25,7 @@
     "@babel/core": "7.26.0",
     "@babel/runtime": "7.26.0",
     "@types/lodash": "4.17.13",
-    "@types/react": "18.3.16",
+    "@types/react": "19.0.1",
     "metro-react-native-babel-preset": "0.77.0",
     "pod-install": "0.3.2",
     "ts-node": "^10.9.2",

example/src/useFirmwareUpdate.ts

@@ -8,7 +8,7 @@ const useFirmwareUpdate = (
 ) => {
   const [progress, setProgress] = useState(0);
   const [state, setState] = useState('');
-  const upgradeRef = useRef<Upgrade>();
+  const upgradeRef = useRef<Upgrade>(null);
 
   useEffect(() => {
     if (!bleId || !updateFileUri) {