chore(package): update @types/react-native to version 0.60.2

Closes #15

Author: greenkeeper[bot]

package.json

@@ -13,7 +13,7 @@
   "devDependencies": {
     "@types/jest": "^23.3.9",
     "@types/react": "^16.7.6",
-    "@types/react-native": "^0.57.7",
+    "@types/react-native": "^0.60.2",
     "@types/react-test-renderer": "^16.0.3",
     "babel-jest": "23.6.0",
     "jest": "23.6.0",