clean up package.json cruft

Summary:

• engines.node is present but should be eliminated.

• stripes.icons contains party and journal, values which appear to be copied straight from ui-oa. These should be eliminated, as should everything in /icons, I think, except the app.* files.

• devDependencies need a major cleanup WRT @babel, @testing-library, jest, etc.

• peerDependencies may need cleanup: are we confident about the refs to @folio/handler-stripes-registry and @folio/service-interaction? moment is present but not actually used AFAIK.