issue template (#137)

Author: chayim

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,7 @@
+Thanks for reporting an issue in NRedisStack! Please update the appropriate text below, as much data as possible really helps!
+
+**NRedisStack Version**: What version of the library are you using
+
+**Redis Stack Version**: What is the version of redis stack where this issue happens?
+
+**Description**: Description of the issue, ideally with sample code, and a stack trace.