add global flag to babelify

.babelrc

lib/collections/ItsLayerCollection.js

lib/collections/LayerLegend.js

lib/collections/Sliders.js

lib/gulp-helpers.js

lib/jquery-plugin/animate-buttons.js

lib/jquery-plugin/day-range.js

lib/jquery-plugin/range-change.js

lib/jquery.js

lib/layers/LayerBase.js

lib/layers/LayerBaseVector.js

lib/layers/LayerBaseVectorEsri.js

lib/layers/LayerBaseVectorGeoJson.js

lib/layers/LayerBaseXyzTile.js

lib/layers/LayerEsriMapServer.js

lib/layers/LayerItsInventory.js

lib/layers/LayerRealEarthTile.js

lib/layers/LayerRealEarthVector.js

lib/mixin/RealEarthAnimate.js

lib/mixin/RealEarthAnimateTile.js