a function to mirror object keys as symbol
npm install keymirror-symbol
``sh`
$ npm install keymirror-symbol
`javascript`
var keyMirrorSymbol = require("keymirror-symbol")
takes an object, and creates a new one having,
for each object's key a key property set toSymbol(key).
`javascript
var constants = keyMirror({
GET_DATA : null,
RECEIVED_DATA : null
})
constants.GET_DATA // Symbol("GET_DATA")
``