Update bundled Prettier version / Support for locally installed Prettier

[dorian-marchal]

Hello,

Thanks for this extension, it's really useful!
Do you plan on updating the bundled Prettier version, or maybe, on adding support for locally installed Prettier executable?
I’ve noticed some formatting differences between Prettier 2 and the current version in the extension.

I saw that there was a previous attempt to update Prettier but it was reverted, what went wrong? Do you need help with anything?

Thanks!