Update version to 2.3.0-pre.12
Update version to 2.3.0-pre.12

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)

beni55/enyo,enyojs/enyo,soapdog/enyo,bright-sparks/enyo,PKRoma/enyo,mcanthony/enyo,bright-sparks/enyo,kustomzone/enyo,wikieswan/enyo,zefsolutions/enyo,soapdog/enyo,beni55/enyo,mcanthony/enyo,enyojs/enyo,PKRoma/enyo,wikieswan/enyo,kustomzone/enyo,zefsolutions/enyo