fix for the error - Reduce of empty array with no initial value

[vicke4]

Hi,

When a JSON has empty key string, this error occurs as the reduce call in the pascelCase function of getNames module doesn't have a default value.

{
  "a": {
    "": {
      "": ""
    }
  }
}

The above JSON will throw the error.

Fixes #18.

[vicke4]

@MariusAlch could you please have a look and close this?

[MariusAlch]

Fixed with recent commits