docs: update SECURITY.md with Tidelift security contact

Author: geemus

SECURITY.md

@@ -1,16 +1,5 @@
-# Security Policy
+# Security contact information
 
-Our README.md is the end all be all for authoritative information, but the following is our security policy.
+To report a security vulnerability, please contact [Tidelift security](https://tidelift.com/security).
 
-## Supported Versions
-
-Versions with :white_check_mark: are supported. All other versions need to be upgraded.
-
-| Version | Supported          |
-| ------- | ------------------ |
-| 1.9.x   | :white_check_mark: |
-| 0.1.x   | :white_check_mark: until July 1st, 2019 |
-
-## Reporting a Vulnerability
-
-Please file an issue here to report a vulnerability. For immediate escalations, please email [email protected] and [email protected] with the subject `[Fog-Google Security Issue] Description`.
+Tidelift will coordinate the fix and disclosure.