updated podspec for new version
updated podspec for new version

instructure/CanvasKit,derrh/CanvasKit,derrh/CanvasKit,derrh/CanvasKit,derrh/CanvasKit,nlambson/CanvasKit,nlambson/CanvasKit,instructure/CanvasKit,instructure/CanvasKit,nlambson/CanvasKit,nlambson/CanvasKit,instructure/CanvasKit