add pwn2own 2018 exploit chain

Author: Escapingbug

README.md

@@ -49,6 +49,7 @@ as well. Contributions are welcome.
 ## Basic
 * [JSC loves ES6](https://webkit.org/blog/7536/jsc-loves-es6/)[article] // multiple articles can be found within
 * [JavaScriptCore, the WebKit JS implementation](http://wingolog.org/archives/2011/10/28/javascriptcore-the-webkit-js-implementation)[article]
+* [saelo's Pwn2Own 2018 Safari + macOS](https://github.com/saelo/pwn2own2018)[exploit]
 
 ## Writeup and Exploit Tech
 * [Attacking WebKit Applications by exploiting memory corruption bugs](https://cansecwest.com/slides/2015/Liang_CanSecWest2015.pdf)[slides]