Long URLs should be hyphenated

[kmccurley]

Dan Bernstein has pointed out that the following URL breaks margins:

@misc{example,
     url={https://www.forbes.com/sites/daveywinder/2019/06/12/warning-windows-10-crypto-vulnerability-outed-by-google-researcher-before-microsoft-can-fix-it/},
     author={Davey Winder},
     title={{Warning: Google researcher drops Windows 10 zero-day security bomb}},
     year={2019}
   }

There is an easy fix for this: put \RequirePackage{xurl} at the end of iacrcc.cls. This should appear after biblatex is loaded.

[jwbos]

This makes perfect sense. Will incorporate this.

[jwbos]

Ädded in #240.