Release 0.6.8

1. Fix broken drag scrolling out of viewport
2. Fix untriggered scroll events
3. Remove select element hack for Firefox
4. Set scrollbar size to 0 when inactive
5. Add tabindex properties to scrollbars

package.json

@@ -1,6 +1,6 @@
 {
   "name": "perfect-scrollbar",
-  "version": "0.6.7",
+  "version": "0.6.8",
   "description": "Minimalistic but perfect custom scrollbar plugin",
   "author": "Hyunje Alex Jun <me@noraesae.net>",
   "contributors": [