Fix bug where Chrome policy warnings are not active

[flotwig]

Current behavior:

registry-js is not included in the final binary, so Chrome policy checks from #4391 don't happen

Desired behavior:

Ship this optionalDependency so the policy checks do happen.

[cypress-bot]

The code for this is done in cypress-io/cypress#4720, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

The code for this is done in cypress-io/cypress#4720, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

Released in 3.5.0.