Pin version of `nwsapi` (revert later) (#73351)
The latest version of `nwsapi` (which is a dependency of
`jest-environment-jsdom > jsdom`) causes `ReferenceError: document is
not defined` errors in some of our tests. We're pinning the old working
version until https://github.com/dperini/nwsapi/issues/135 is resolved.
