A CI job has been added to ensure the `allow-scripts` config and the
LavaMoat auto-generated policy is up-to-date. This will only run on
release branches and the `master` branch, because it's too difficult a
requirement to meet for each PR for contributors on macOS, due to
differences in the dependency graph caused by optional dependencies.
The `allow-scripts` and LavaMoat policy have both been updated using
`yarn allow-scripts auto` and `yarn lavamoat:auto`.