added disclosure policy

Author: Newcomer1989

SECURITY.md

@@ -0,0 +1,19 @@
+# Security Policy
+
+## Supported Versions
+
+Currently supported versions, which will receive security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 1.3.x   | :white_check_mark: |
+| < 1.2   | :x:                |
+
+## Reporting a Vulnerability
+
+In case you found a security vulnerability, please do NOT open a public pull request or leak information inside an issue.
+
+Use prefered our email to get in touch with us:<br>
+**admin [at] ts-n [dot] net**
+
+You can expect a response within a week.