Create SECURITY.md

Author: B4rtekk1

SECURITY.md

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+# Security Policy
+
+## How to report a security vulnerability
+
+If you discover a security vulnerability in this project, please report it by emailing [bartoszkasyna@gmail.com] with detailed information. Please do not create a public issue.
+
+## Supported versions
+
+We actively maintain and provide security fixes for the following versions:
+
+- Version 1.x.x and above
+- Older versions are no longer supported