Merge pull request #237 from python-validators/security-md-patch

Create SECURITY.md

Author: yozachar

SECURITY.md

@@ -0,0 +1,20 @@
+# Security Policy
+
+## Supported Versions
+
+| Version   | Supported          |
+| --------- | ------------------ |
+| ^0.20.0   | :white_check_mark: |
+
+## Reporting a Vulnerability
+
+Please read [CVD](https://resources.sei.cmu.edu/asset_files/SpecialReport/2017_003_001_503340.pdf) before reporting vulnerabilities.
+
+- [@kvesteri](https://github.com/kvesteri) is the author of `validators`.
+- You can find his and other maintainers' email in the commits.
+- We do our best to write safe code.
+- None of us can promise any response timeframe, but we'll try our best.
+
+That said, use the package at your own risk. The source code is open, we encourage you to read.
+
+> Spammers with be banned.