Create SECURITY.md

SECURITY.md

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+# Security Policy
+
+
+If you have found a security vulnerability in MyFinances please __**DO NOT**__ share this in Github Issues, Discussions, or any public chat space. Create a [security advisory](https://github.com/TreyWW/MyFinances/security/advisories/new) with as much detail as you are aware of.
+
+## Supported Versions
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 0.x.x   | :white_check_mark: |
+| < 0.2.1   | :x:                |