You can achieve something similar with Alfred 3's auto-expanding snippets and Joe Califa's Alfred Emoji Pack, but if for some reason you don't own Alfred 3, this is a great alternative solution!
Installation is super easy — such a great trick @warpling:
1. Download emoji substitutions.plist
2. Open System Preferences and navigate to Keyboard > Text
3. Drag the emoji substitutions.plist to the list of substitutions to add them
4. Type something like :boom: or :blackbox: and hit space after! 💥⬛️
Raycast