build(deps): bump react-native from 0.63.4 to 0.64.1 in /example

Bumps [react-native](https://github.com/facebook/react-native) from 0.63.4 to 0.64.1.
- [Release notes](https://github.com/facebook/react-native/releases)
- [Changelog](https://github.com/facebook/react-native/blob/main/Releases.md)
- [Commits](facebook/react-native@v0.63.4...v0.64.1)

---
updated-dependencies:
- dependency-name: react-native
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

example/package.json

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "react": "16.13.1",
-    "react-native": "0.63.4"
+    "react-native": "0.64.1"
   },
   "devDependencies": {
     "@babel/core": "^7.12.10",