ENYO-2627: `npm pack builds` minified Ares2 

* JIRA https://enyojs.atlassian.net/browse/ENYO-2627 (depends on https://enyojs.atlassian.net/browse/ENYO-3708)
* Depends on https://github.com/enyojs/ares-project/pull/767 (ENYO-3708)
* Tested on OSX/Chrome & OSX/Safari

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>