fix: update cpy and fix type errors

[tinfoil-knight]

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Summary

Partial fix for netlify/cli#4921, netlify/cli#2744.

This PR reduces the amount of security vulnerabilities reported by npm audit so that netlify-cli (dependent on packages in this repo) shows lesser warnings on installation.

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[tinfoil-knight]

@danez Please review. (I don't have permissions to add reviewers on run workflows in this repository unfortunately)

[tinfoil-knight]

PR opened by renovate is failing all tests due to the type errors.

#4199

Update:
Marking as draft due to the test errors.

Update:
There might be an error in how cpy is handling paths when passed the cwd (current working directory) option. I'm inspecting this & will push a fix in https://github.com/sindresorhus/cpy if necessary.

Update:
Created an issue here: sindresorhus/cpy#107

[danez]

Already done in #5011