move current photoswipe version to var in top of file
move current photoswipe version to var in top of file

n3k/ember-cli-photoswipe,osxi/ember-cli-photoswipe,osxi/ember-cli-photoswipe,n3k/ember-cli-photoswipe,igorrKurr/ember-cli-photoswipe,poetic/ember-cli-photoswipe,StreetHub/ember-cli-photoswipe,igorrKurr/ember-cli-photoswipe,StreetHub/ember-cli-photoswipe,ssendev/ember-cli-photoswipe,ssendev/ember-cli-photoswipe,AltSchool/ember-cli-photoswipe,poetic/ember-cli-photoswipe,AltSchool/ember-cli-photoswipe