This is here to facilitate our discussion about potentially adopting

auto-formatting for our codebase. This change uses prettier to format

the common directory in our JavaScript code, with the following

settings:

 "prettier": {
    "quoteProps": "consistent",
    "singleQuote": true,
    "tabWidth": 4
  }


I admit that there are decisions that prettier makes that bother me a

bit more than the ones in black for Python code. That said, I don't

see anything that I'd consider a deal-breaker, and I still think it may

be an overall productivity win.