feat: add pompelmi to Security section (sorrycc#961)

Adding pompelmi, a malware scanner for Node.js.

Author: SonoTommy

README.md

@@ -587,6 +587,7 @@ There're also some great commercial libraries, like [amchart](https://www.amchar
 * [js-xss](https://github.com/leizongmin/js-xss) - Sanitize untrusted HTML (to prevent XSS) with a configuration specified by a Whitelist.
 * [xss-filters](https://github.com/yahoo/xss-filters) - Secure XSS Filters by Yahoo.
 * [sanitize-html](https://github.com/apostrophecms/sanitize-html) - sanitize-html provides a simple HTML sanitizer with a clear API.
+* [pompelmi](https://github.com/pompelmi/pompelmi) - Fast file-upload malware scanning for Node.js.
 
 ## Log