Passing the socket from the request to the `IncomingMessage` is what
happens in native Node. Using a dummy `EventEmitter` then tacking the
socket onto the response later is kludge from historical tech-debt that
can now safely be cleaned up.

By default, NPM will pack and publish all files in the directory.
For us, that was 50+ files including lint configs, Github templates,
RFCs, examples, etc.
This change limits the files to just those used by consumers when in the
context of a dependency. Plus what NPM always includes: README, LICENSE,
and CHANGELOG.

#1750)

This test was flaky on my machine.

I’ve also refactored to use async and the tap assertions a little more cleanly.

This also renames the `scopes` property to `interceptors`, which is more appropriate since it holds instances of `Interceptor`.

…never match (#1744)

Fix #1730