Set trailing comma to none

[koddsson]

The default value for trailingComma changes from none to default in prettier 2.0.

This change overwrites the default with none so that we don't have any trailing commas in our codebase when we upgrade to prettier 2.0.

📚 References

https://prettier.io/docs/en/options.html#trailing-commas

[keithamus]

I like trailing commas, but thats, just like, my opinion, man.

[koddsson]

I actually do too but the thinking here was to make as little changes as possible. I'd be down to make the changes if we want to keep trailing commas going forward. They do make diffs a lot cleaner since you don't have to add or remove a comma when adding to a multi-line list.

@muan & @dgraham what do you think?

[dgraham]

the thinking here was to make as little changes as possible.

👍

[koddsson]

We can always revisit this later ✨