In issue template, recommend to use typescript@next (microsoft#19098)

Andy · web-flow · commit 0c4fe37a92c6 · 2017-10-11T10:03:29.000-07:00
diff --git a/issue_template.md b/issue_template.md
@@ -2,7 +2,8 @@
 <!-- QUESTIONS: This is not a general support forum! Ask Qs at http://stackoverflow.com/questions/tagged/typescript -->
 <!-- SUGGESTIONS: See https://github.com/Microsoft/TypeScript-wiki/blob/master/Writing-Good-Design-Proposals.md -->
 
-**TypeScript Version:**  2.4.0 / nightly (2.5.0-dev.201xxxxx)
+<!-- Please try to reproduce the issue with `typescript@next`. It may have already been fixed. -->
+**TypeScript Version:**  2.6.0-dev.201xxxxx
 
 **Code**
 
