Docs: New syntax issue template

.github/ISSUE_TEMPLATE/NEW_SYNTAX.md

@@ -0,0 +1,43 @@
+---
+name: "\U0001F4DD Request new syntax support"
+about: Request new stage 4 syntax be supported.
+title: ''
+labels:
+    - core
+    - new syntax
+assignees: ''
+
+---
+
+<!--
+    ESLint adheres to the Open JS Foundation Code of Conduct:
+    https://eslint.org/conduct
+-->
+
+**What is the name of the syntax to implement?**
+
+<!-- for example, "class fields" -->
+
+**Please provide the TC39 URL for the syntax proposal:**
+
+
+
+**Please provide some example code for the new syntax:**
+
+```js
+// example code here
+```
+
+## Implementation Checklist
+
+Please check off all items that have already been completed. Be sure to paste the pull request URLs next to each item so we can verify the work as done.
+
+- [ ] Ecma262 update: <!-- paste PR URL for this syntax here -->
+- [ ] ESTree update: <!-- paste PR URL for this ESTree update here -->
+- [ ] Acorn update: <!-- paste PR URL for this syntax here -->
+- [ ] `eslint-visitor-keys` update: <!-- paste PR URL for this syntax here -->
+- [ ] `espree` update: <!-- paste PR URL for this syntax here -->
+- [ ] `eslint-scope` update: <!-- paste PR URL for this syntax here -->
+- [ ] `eslint` update: <!-- paste PR URL for this syntax here -->
+
+**Are you willing to submit a pull request to implement this syntax?**