⬆️ Bump react-native from 0.59.3 to 0.59.4 in /example

Bumps [react-native](https://github.com/facebook/react-native) from 0.59.3 to 0.59.4.
- [Release notes](https://github.com/facebook/react-native/releases)
- [Changelog](https://github.com/facebook/react-native/blob/master/Releases.md)
- [Commits](facebook/react-native@v0.59.3...v0.59.4)

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

Author: dependabot-support

example/package.json

@@ -15,7 +15,7 @@
     "mobx": "^5.9.4",
     "mobx-react": "^5.4.3",
     "react": "16.8.3",
-    "react-native": "0.59.3",
+    "react-native": "0.59.4",
     "react-gondola": "file:../src"
   },
   "devDependencies": {

example/yarn.lock

@@ -5007,10 +5007,10 @@ react-lifecycles-compat@^3.0.2:
   resolved "https://registry.yarnpkg.com/react-lifecycles-compat/-/react-lifecycles-compat-3.0.4.tgz#4f1a273afdfc8f3488a8c516bfda78f872352362"
   integrity sha512-fBASbA6LnOU9dOU2eW7aQ8xmYBSXUIWr+UmF9b1efZBazGNO+rcXT/icdKnYm2pTwcRylVUYwW7H1PHfLekVzA==
 
-react-native@0.59.3:
-  version "0.59.3"
-  resolved "https://registry.yarnpkg.com/react-native/-/react-native-0.59.3.tgz#b984bbe457f63d5515046d32ea5721fd22843548"
-  integrity sha512-dv3AA2rH0L0IccxRkIs4YsriaECy9ttTXrwrgwETXqmE45uVrBFRGePUFnqjcikYkkm6sS0FRxcva088un76JA==
+react-native@0.59.4:
+  version "0.59.4"
+  resolved "https://registry.yarnpkg.com/react-native/-/react-native-0.59.4.tgz#c0725e2e8efdea135533794ce95fea2289fe619a"
+  integrity sha512-etnXQp9IZgC8Vj5gsxZEDP4xRjJVNIj5/BSE1WcNAONG6tu6+mDBntx1jxHInwh61WYNgoQJuQGsbN5Na59ZDw==
   dependencies:
     "@babel/runtime" "^7.0.0"
     "@react-native-community/cli" "^1.2.1"