Update the favico.js package.

From
https://github.com/ejci/favico.js/tree/ca5e30446b304177a0ee25914e9899801b67b59b
which fixes https://github.com/ejci/favico.js/issues/22

Change-Id: I08e5c98b5d686df2b664fe22e288a86e81d32510