fix(package): update react-native to version 0.52.1

Author: greenkeeper[bot]

package.json

@@ -78,7 +78,7 @@
     "querystring": "0.2.0",
     "react": "16.2.0",
     "react-markdown": "2.5.1",
-    "react-native": "0.52.0",
+    "react-native": "0.52.1",
     "react-native-button": "2.2.0",
     "react-native-calendar-events": "1.4.3",
     "react-native-communications": "2.2.1",