wip: manifest v1 and lit 2

[bennypowers]

Fixes #61

What I Did

1. update most dependencies
2. use the types from the v1 custom-elements manifest
   • still some clean up work to do matching class fields to attributes
3. wip migration to lit 2
   • the directives need some attention here, I could use a hand
4. wip es-dev-server -> wds

If the general direction seems agreeable, let's continue

Most of the mechanical migration is done. It seems to me the last things needed are:

• port the custom directive to lit 2
• rework the concept of knobs to accept manifest v1

For knobs, I think probably the way to go here is to either
1. create our own modified manifest data structure when the manifest is loaded
2. separate the knobs data structure entirely from the manifest structure

[web-padawan]

Thanks for the PR. I will start from version bumps and port some of them to master so you can rebase.

[bennypowers]

closing in favour of #84