I edited some squircle-style icons for macOS BigSur (VLC, BBEdit, iTerm, Transmission, Chrome) and I thought I’d post them here in case anyone wants to help make their dock look a little more uniform with everything else.
 
Edit: After some small annoyances, I’ve switched my browser to Firefox and my editor to TextMate — they are better-built apps for macOS! Also added an app icon for Music 🎵
 
Bonus: Dock Spacers!
defaults write com.apple.dock persistent-apps -array-add '{"tile-type"="small-spacer-tile";}' && killall Dock