This reverts commit 4bf5288d.

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

Replace with the event bus for now

lerna complains about this

And remove the custom publish commands

Takes a package name and a dest path. This way we can more eassily change the
layout and it will error out on package name typos or missing packages.

Add a scope so we don't have to care about naming conflicts
and set the verison to 0.1.0 since we don't have a stable API yet.

While it's nice to have a fixed chrome version it slows down the yarn install,
downloads a lot of things, and the chrome version depends on various
system packages so one needss to have chromium installed anyway.

This means developers that want to work on tests need firefox and chdomium installed.

Sadly I couldn't find a way to make browsers optional in case the developer
only has one installed.