Create SECURITY.md

Author: SimplyCorey

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+
+| Version | Supported          |
+| ------- | ------------------ |
+| >= 2.x   | :white_check_mark: |
+| <= 1.x   | :x:                |
+
+## Reporting a Vulnerability
+
+Please report security vulnerabilities responsibility by emailing `security@simplesoftware.io.`
+
+We will fix the vulnerability privately, push a new release, and then go public with the notification.