Create SECURITY.md

Author: ErenElagz

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+There is no support for the oldest version of the book. (And actually no need)
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 1.x.x  | :white_check_mark: |
+| 0.x.x   | :x:                |
+
+## Reporting a Vulnerability
+
+If you find any problem with this project, please feel free to contact me and we can talk about it in the discussion section.