Merge pull request react-native-maps#1503 from rmrs/fix_example

Remove caret from "react": "^16.0.0-alpha.12"

Author: gpeal

package.json

@@ -50,7 +50,7 @@
     "gitbook-cli": "^2.3.0",
     "lodash": "^4.17.2",
     "prop-types": "^15.5.10",
-    "react": "^16.0.0-alpha.12",
+    "react": "16.0.0-alpha.12",
     "react-native": "^0.45.1"
   },
   "rnpm": {