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.

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

This prevents eslint from traversing the parent directories. In
the case there was a conflicting eslint config in a parent directory it would
error out otherwise (like is the case in our apps)

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

Use "language" instead of "lang" because "lang" seems to be handled specially in html elements (dbp/apps/library#77)

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

Implement "set-property" handling in dbp-provider and use it in dbp-language-select (dbp/apps/library#77)

lerna complains about this

And remove the custom publish commands