README typing error

[Passigit]

var CoinKey = require('coinkey')

var privateKeyHex = "1184cd2cdd640ca42cfc3a091c51d549b2f016d454b2774019c2b2d2e08529fd"

// Bitcoin Address
var key = new CoinKey(new Buffer(**privatKeyHex**, 'hex'))
console.log(key.publicAddress) // => 16UjcYNBG9GTK4uq2f7yYEbuifqCzoLMGS

"privatKeyHex" must be "privateKeyHex"