Create SECURITY.md (#179)

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+
+| Version | Supported          |
+| ------- | ------------------ |
+| main branch  | :white_check_mark: |
+
+## Reporting a Vulnerability
+
+We appreciate your efforts to responsibly disclose your findings, and we will make every effort to acknowledge your contributions.
+
+To report a security issue, please use the GitHub Security Advisory ["Report a Vulnerability"](https://github.com/bytewelder/tactility/security/advisories/new) tab.
+
+You can expect a response indicating the next steps in handling your report. After the initial reply to your report, you'll be kept informed of the progress towards a fix and full announcement, and may ask for additional information or guidance.
+
+Report security bugs in third-party dependencies to the person or team maintaining the module.