Add a issue template for users filing new issues

Author: megawac

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,14 @@
+<!--
+This template is for bug reports. If you are reporting a bug, please continue on. If you are here for another reason (such as a feature request, change, or question) you can disregard this template
+-->
+
+**What version of async are you using?**
+
+**Which environment did the issue occur in (Node version/browser version)**
+
+**What did you do? Please include a minimal reproducable case illustrating issue.**
+
+**What did you expect to happen?**
+
+**What was the actual result?**
+