remove old dev deps

[MoOx]

No description provided.

[Copilot]

Pull request overview

This PR removes legacy dev-only test dependencies (Mocha/Should) and migrates the test suite to Node’s built-in test runner, reducing external tooling while keeping test coverage in-repo.

Changes:

• Replaced mocha + should assertions with node:test + node:assert in the existing test file.
• Removed old devDependencies from package.json and pruned them from package-lock.json.
• Updated the npm test script to use node --test.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 3 comments.

File	Description
test/rework.js	Migrates tests from should assertions to node:assert while using node:test primitives.
package.json	Drops Mocha/Should dev deps and switches the test script to Node’s test runner.
package-lock.json	Removes lockfile entries that were only needed for the deleted devDependencies.

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