docs: added [email protected] to vulnerability disclosure

Author: niftylettuce

Readme.md

@@ -174,7 +174,7 @@ $ npm test
 ## Reporting vulnerabilities
 
 To report a security vulnerability, please do not open an issue, as this notifies attackers
-of the vulnerability. Instead, please email [dead_horse](mailto:[email protected]) and [jonathanong](mailto:[email protected]) to
+of the vulnerability. Instead, please email [niftylettuce](mailto:[email protected]), [dead_horse](mailto:[email protected]), and [jonathanong](mailto:[email protected]) to
 disclose.
 
 ## Authors