Added some of the dict python api to JS Object type

python-dict-to-js-object.js

;((Object) => {
  Object.prototype.keys = Object.prototype.keys || function() {
    return Object.keys(this);
  }

  Object.prototype.values = Object.prototype.values || function() {
    return this.keys().map(key => this[key]);
  }

  Object.prototype.items = Object.prototype.items || function() {
    return this.keys().map((key) => {
      return [key, this[key]];
    });
  } 
})(Object);