Root devdeps

[Rich-Harris]

Moves shared devDependencies into the workspace root

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[Rich-Harris]

an alternative is to put all devDeps in the workspace root (except e.g. the ones shiki-twoslash needs to have in the site dir for building the docs)

[benmccann]

Why tilde instead of caret?

[Conduitry]

I'm not sure how @types/node versions correspond to Node versions. If we're saying we support Node 16+, we should make sure we only have Node 16.0 types available, and not those from any later versions of Node 16. I don't know how we enforce this. Would that be ~16.0.0?

If that's the purpose of the tilde, and if that's how the @types/node versions work, we should make sure we don't bring in types for versions of Node we don't support (so that the typechecking can yell at us immediately if we use unsupported features), so that's why no caret, but also ~16.11 isn't what we want to be depending on either.

[mrkishi]

Errr, wait. I completely confused things in my head. I intended to use ~ for Typescript, not Node... This was me failing to diff Rich's changes on top of the ones I had already done.

[Conduitry]

If @types/node@16.11.x is types for Node 16.11.x (is it?), then we don't want to use those types, as they would include features added after Node 16.0, and we're claiming SvelteKit works with any version of Node 16+ (which would include Node 16.0). If that's how versioning on @types/node indeed works, it would be nice to be warned by the typechecker that we are using features of Node that we shouldn't.

[mrkishi]

Since they're manually maintained, there's a best-effort process to match the major and minor versions with Node's. I'm not sure they backport fixes to previous minor versions when a gap is found late (eg. 16.1 backported to 16.0), though.

We could make it ~16.0, but maybe we need some CI tests to make sure it doesn't get changed accidentally. Apparently Svelte's =8 didn't last 3 months, eh, Conduitry? 😆

I joke, but all package managers encourage us to update even if pinned to exact versions when updating post-package.json, so a CI check isn't that ridiculous.