Possibly chokidar v4 is out by then and we should check whether or not to switch to it. By the looks of it it will be ESM only, so we need change our output to be ESM, too. But that sounds like a good thing to do either way; and likely harmless since svelte-check is meant to be used as a command line tool where that doesn't matter.
Checks which minimum Node version to support. Probably 18
Loose collection of things we should do for v4:
Timing: