svelte:fragment support (Svelte 3.35.0)

[CherryDT]

Using <svelte:fragment> gives the error Valid <svelte:...> tag names are svelte:head, svelte:options, svelte:window, svelte:body, svelte:self or svelte:component.

<svelte:fragment> is new in Svelte 3.35.0 and unfortunately they didn't add it to the docs yet even though it's the only way to replace duplicate slots which turned into an error in the same update (see sveltejs/svelte#6061)

For more info, see the RFC and its comments - note that it was originally called <svelte:slot> but in the final version it was changed to <svelte:fragment>.

[CherryDT]

Never mind, turns out this error comes from Svelte's own compiler and I had to reload the window in VSCode for your plugin to pick up the new Svelte version.