Update react monorepo

Author: mend-5034428[bot]

example/package.json

@@ -6,12 +6,12 @@
     "start": "node node_modules/react-native/local-cli/cli.js start"
   },
   "dependencies": {
-    "react": "15.4.2",
+    "react": "15.7.0",
     "react-native": "0.42.3",
     "react-native-custom-tabs": "file:.."
   },
   "devDependencies": {
-    "@types/react": "15.0.39",
+    "@types/react": "15.7.34",
     "@types/react-native": "0.42.3"
   }
 }

package.json

@@ -29,7 +29,7 @@
   },
   "devDependencies": {
     "react-native": "0.42.3",
-    "react": "15.4.2",
+    "react": "15.7.0",
     "babel-preset-react-native": "1.x.x",
     "eslint": "3.x.x",
     "eslint-plugin-babel": "3.x.x",