Create SECURITY.md (#973)

* Create SECURITY.md

* Update SECURITY.md

Co-authored-by: José Padilla <jpadilla@webapplicate.com>

* Update SECURITY.md

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Co-authored-by: José Padilla <jpadilla@webapplicate.com>

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+
+The following versions of this project are currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 2.9.x   | :white_check_mark: |
+| < 2.8   | :x:                |
+
+## Reporting a Vulnerability
+In order for the vulnerability reports to reach maintainers as soon as possible, the preferred way is to use the "Report a vulnerability" button under the "Security" tab of the associated GitHub project. This creates a private communication channel between the reporter and the maintainers.
+
+If you are absolutely unable to or have strong reasons not to use GitHub's vulnerability reporting workflow, please reach out to [security@jpadilla.com](mailto:security@jpadilla.com).