🛠 Repo: Bump nyc from 15 to 17

[JoshuaKGoldberg]

Tooling Suggestion Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have read and agree to Mocha's Code of Conduct and Contributing Guidelines
• I have searched for related issues and issues with the faq label, but none matched my issue.
• I want to provide a PR to resolve this

Overview

Mocha has a devDependency right now on a 5-year-old version of nyc:

mocha/package.json

Line 162 in b2985b3

"nyc": "^15.1.0",

This isn't a problem on its own. nyc@15 works as-is. But it pulls in old dependencies that bloat our local node_modules size. For example, in #5482, we see it pulling in supports-color@5 inside some older @babel/* packages:

└─┬ nyc@15.1.0
  └─┬ istanbul-lib-instrument@4.0.3
    └─┬ @babel/core@7.21.3
      └─┬ @babel/code-frame@7.22.13
        ├─┬ @babel/highlight@7.22.20
        │ └─┬ chalk@2.4.2
        │   └── supports-color@5.5.0
        └─┬ chalk@2.4.2
          └── supports-color@5.5.0

I think it'd be a good idea in general to bump it to the latest major version.

Additional Info

In theory it'd be nice to automatically upgrade all devDependencies. #5055 is blocked for now: #5055 (comment).

No relevant breaking changes, only minimum Node version now being 18: https://github.com/istanbuljs/nyc/blob/main/CHANGELOG.md

💖