README: add link to cs-demo-minifier

Author: markus-wa

README.md

@@ -155,6 +155,7 @@ It's recommended to use some kind of dependency management system such as [dep](
 ## Projects using demoinfocs-golang
 
 - [noesis.gg](https://www.noesis.gg/) - A suite of explorative tools to help you analyze and improve your CS:GO performance.
+- [cs-demo-minifier](https://github.com/markus-wa/cs-demo-minifier) - Converts demos to JSON, MessagePack and more
 
 If your project is using this library feel free to submit a PR or send a message in Gitter to be included in the list.