chore(package): update react-native to version 0.60.4 (#207)

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "jest": "^24.7.1",
     "metro-react-native-babel-preset": "^0.52.0",
     "react": "16.8.6",
-    "react-native": "0.60.3",
+    "react-native": "0.60.4",
     "react-test-renderer": "16.8.6",
     "release-it": "^12.3.3",
     "strip-ansi": "^5.2.0",