Missing companion objects

[armanbilge]

The companion objects for ResponseInit and experimental.serviceworker.ServiceWorkerGlobalScope seem to have gone missing, possibly more...

Came up while working on http4s/http4s-dom#23.

[armanbilge]

Update: ResponseInit was correctly removed from dom, it should only exist in the deprecated packages. Loss of ServiceWorkerGlobalScope I think is my screw up in a migration PR 😆