This change accomplishes several tasks towards unifying our JavaScript

build infrastructure:

Replace many specific dependencies with new dependencies on our

  metapackages (@beanbag/js-buildkit and

@beanbag/frontend-buildkit).
Update package.json scripts to be more consistent with our other

  packages (build, clean, full-build, lint, and test).
Use @babel/register for transpiling during jasmine testing rather

  than ts-node. It seems like the ts-node one was broken on modern

  jasmine and/or node as it was, and using babel instead keeps our

  unit tests running in a much closer mode to how the code is built

  for packaging anyway.
Base tsconfig.json on our shared config.
Update for eslint 9.

Did builds and installed both in isolation as well as in a workspace

  with a bunch of our other JS packages.
Ran unit tests.
Ran eslint (there are a bunch of existing errors that it's showing).
Ran npm pack and verified that the resulting tarball included all

  the expected files.