Added pull request template.

Author: springcomp

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

@@ -0,0 +1,32 @@
+# \<TITLE>
+
+|||
+|---|---
+| **JEP**    | 
+| **Author** | \<author>
+| **Status** | draft
+| **Created**| \<date>
+
+## Abstract
+
+## Motivation
+
+For example, suppose we had this data:
+
+```
+{"first_choice": "WA",
+ "states": [
+   {"name": "WA", "cities": ["Seattle", "Bellevue", "Olympia"]},
+   {"name": "CA", "cities": ["Los Angeles", "San Francisco"]},
+   {"name": "NY", "cities": ["New York City", "Albany"]},
+ ]
+}
+```
+## Specification
+
+Describe the grammar changes or new functions.
+
+## Rationale
+
+Why problems is this JEP addressing?
+Has alternatives been considered?