Create SECURITY.md (#65)

publish security policy

Author: cdimascio

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+
+Use this section to tell people about which versions of your project are
+currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 3.x   | :white_check_mark: |
+
+## Reporting a Vulnerability
+
+To report a vulnerability, create an issues and email cdimascio@gmail.com. Thanks!
+
+Security updates are prioritzed!