[add] devicon required

README.md

@@ -43,6 +43,8 @@ When you should use the FortySecondsCV class:
 
 ## Requirements
 
+[devicons](https://github.com/devicons/devicon)
+
 You need to compile your document with XeLaTeX or LuaLaTeX in order to have
 the latest Font Awesome icons (`fontawesome5`) and Academicons. If you still
 want to compile with pdfLaTeX for whatever reason, ~~FortySecondsCV will fall