fix(view-slot): use animations on all slot modifications and properly return promises
fix(view-slot): use animations on all slot modifications and properly return promises

milunka/aurelia-templating,charlespockert/templating,PWKad/templating,michaelgeorgeattard/templating,shanonvl/aurelia-templating,davismj/templating,aurelia/templating,aurelia/templating,hitesh97/templating,JeroenVinke/templating,tcollard/templating,cmichaelgraham/templating,simudream/templating,AshleyGrant/templating