Add tidelift security contact information

Author: mdevils

README.md

@@ -145,21 +145,8 @@ LICENSE
 
 MIT
 
-Security contact information
-----------------------------
+## Security contact information
 
 To report a security vulnerability, please use the
-[Tidelift security contact](https://tidelift.com/security). Tidelift will
-coordinate the fix and disclosure.
-
-`css-selector-parser` for enterprise
-------------------------------
-
-Available as part of the Tidelift Subscription
-
-The maintainers of `css-selector-parser` and thousands of other packages are working with
-Tidelift to deliver commercial support and maintenance for the open source
-dependencies you use to build your applications. Save time, reduce risk, and
-improve code health, while paying the maintainers of the exact dependencies you
-use.
-[Learn more.](https://tidelift.com/subscription/pkg/npm-css-selector-parser?utm_source=npm-css-selector-parser&utm_medium=referral&utm_campaign=enterprise)
+[Tidelift security contact](https://tidelift.com/security).
+Tidelift will coordinate the fix and disclosure.