create iban.min.js file

[dkern]

Add a minified file for productive use.

[LaurentVB]

Hi, thanks for your proposal.
It is a good idea but it really should be accompanied by the build script that generates the minified file, for reproduce-ability and future updates.

[dkern]

Yes, sure. But I was thinking, if you don't provide a min file yet, you would not like to create a build script and so I keept it simple. 😉 Feel free to close the PR then.