Merge pull request #991 from akiran/dev

modified issue template to add demo playground

Author: akiran

.github/ISSUE_TEMPLATE.md

@@ -1,2 +1,3 @@
 <!-- Love react-slick? Please consider supporting our collective:
-👉  https://opencollective.com/react-slick/donate -->
+👉  https://opencollective.com/react-slick/donate -->
+### Guidlines for posting new issue* Please replicate your issue with this [CodeSandBox](https://codesandbox.io/s/zzloxr09mp) and provide a link to it along with the issue description