How to customize this module

I used angular-input-masks when it was 1.4 and only used the global and US masks by adding "angular-input-masks.us.js" into my script. With the new change in 2.0 I don't really understand how to install it just the parts I need. The entire library is kind of large (150kb without minification) and I only need the global and US masks.

What files do I need to include? I can't just add "angular-input-masks.us.js" by itself anymore.
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