update react-test-renderer to 16-alpha

Author: hawkrives

package.json

@@ -116,6 +116,6 @@
     "pify": "2.3.0",
     "prettier": "1.4.4",
     "react-native-view-shot": "1.10.1",
-    "react-test-renderer": "15.6.1"
+    "react-test-renderer": "16.0.0-alpha.12"
   }
 }