These are all transitive dependencies (or unused) so they get pulled in
anyway.

In newer versions there is now a normal method for this which also supports
dynamically added components.

The static version is deprecated and removed in 2.0, so we need to port here.

It's confusing that there are two lock files in this repo and two
overlapping workspaces. Ideally everything should be in sync.

This has proper support for rollup while providing the same API.

This is what open-wc recommends now and uses in their @open-wc/testing package

Versions: Lit-Element to 2.4.0 and Lit-HTML to 1.3.0

This fixes a typescript problem and allows us to enable type checking
in the typescript-example package (by removing the ts-nocheck comment)

This is all very basic, building works, testing works,
but there are type checking errors which I don't know how
to fix.

Improvements welcome.

See #41