Publish npm package on push

[lenkan]

It would be nice to have the signify-ts package published to npm (or github packages) on push. We can use a "development" or "next" tag for pushes to development branch.

The benefit of this is that users avoid pulling all signify-ts build dependencies and just use the already built modules. I.e., only the dist folder and package.json files will be published.

I can create an outline PR with the workflow for this if you think it is a good idea.