If an env script is already defined, run that
instead of the default.

PR-URL: npm#2655
Credit: @isaacs
Close: npm#2655
Reviewed-by: @ljharb

Emphasizing them like we do everywhere else to fix encoding errors and
for consistency.

Also removed the `<String>` from the type definition as we don't do that
anywhere else.

PR-URL: npm#2662
Credit: @ethomson
Close: npm#2662
Reviewed-by: @wraithgar

This brought in @npmcli/installed-package-contents@1.0.7 from
commit e1822cf

This pulls in, installs, and de-dupes our subdependencies.
Notable updates are promise-retry and @npmcli/move-file which
had new versions but we had no way to update and/or dedupe

We also manually removed uuid from our package.json which was
only added in the past to try to get around this same deduping
issue

This decouples our tests from depending on the node version being right, and
allows us to run in all of the environments we need to during CI.

PR-URL: npm#2681
Credit: @ljharb
Close: npm#2681
Reviewed-by: @wraithgar