v2.0.0

• Fix: add missing change event after card formatting (h/t @JeffreyVest)
• Feat: added support for new MasterCard series 2 BINs (h/t @ahumphreys87)

In addition to those code changes, with 2.0.0 we change how the code is built and packaged. There are now two different distribution folders:

1. lib/ - this includes ES5 compatible code that can be built with anything that supports node style require statements (like browserify and webpack).
2. dist/ - this includes browser compatible code that can be included in <script> tags

Thanks to everyone who contributed!