Release 0.6.13

1. Add meta and alt key handling in keyboard scrolling - #549
2. Implement reverse wheel axis on shift key - #548
3. Add TypeScript definition - #552
4. Fix click propagation on scrollbar thumbs - #526 #547
5. Implement correct click-rail handler - #568
6. Minor bug fixes

package.json

@@ -1,6 +1,6 @@
 {
   "name": "perfect-scrollbar",
-  "version": "0.6.12",
+  "version": "0.6.13",
   "description": "Minimalistic but perfect custom scrollbar plugin",
   "author": "Hyunje Alex Jun <me@noraesae.net>",
   "contributors": [