Merge branch 'main' of https://github.com/csstools/postcss-resolve-nested-selector

Author: romainmenke

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+
+Only the latest version of plugins and packages will receive security patches.  
+Please reach out if you need extended support for an older version.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 5.1.x   | :white_check_mark: |
+| 5.0.x   | :x:                |
+| 4.0.x   | :x:                |
+| < 4.0   | :x:                |
+
+## Security contact information
+
+To report a security vulnerability, please use the
+[Tidelift security contact](https://tidelift.com/security).
+Tidelift will coordinate the fix and disclosure.