support for julia icons in UbuntuMono
Requesting support for Julia Icons for `UbuntuMono Nerd Font` using the font in `iTerm` `macOS` with [exa](https://the.exa.website/features/grid-view)

![Screenshot 2022-02-21 at 5 45 25 PM](https://user-images.githubusercontent.com/8083613/154953488-f71103b8-1373-4c29-bb61-0a260854a60f.png)
