Unused dependencies validation is not working

[kricsleo]

Environment

unbuild@3.5.0

Reproduction

https://stackblitz.com/edit/github-8qb4tr6d?file=package.json&startScript=build

Describe the bug

lodash is installed as a dependency but isn't referenced in the source code.

The build should warn for this unused dependency.

unbuild/src/validate.ts

Lines 33 to 39 in a6570a5

	if (unusedDependencies.size > 0) {
	warn(
	ctx,
	"Potential unused dependencies found: " +
	[...unusedDependencies].map((id) => colors.cyan(id)).join(", "),
	);
	}

Additional context

No response

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