allow data types to be represented as ES6 symbols

[mistadikay]

With new “symbol” primitive type in ES6 there is a good pattern using symbols as constants values to guarantee these values to be unique. More about symbols here: http://www.2ality.com/2014/12/es6-symbols.html

Usage example:

module.exports = {
  BLOCK: Symbol(),
  IMAGE: Symbol()
};

[gaearon]

That's nice. Thanks!

[gaearon]

Released in 0.9.1.