chore: prettier format test

[roberttran-cc]

Thanks for this preview branch, it really helps!

Overall, I'm really looking forward the benefits of this tool, although some rules are meh but we'll be able to adjust them over time.

Random feedback:

• we should disable the rule enforcing self closing HTML tags, as they seem unnecessary
• we should exclude some files from this formatter:
  • src/assets/*.icons.js
  • src/assets/world-110m.geo.js
  • src/stories/fixtures/*.js