Bump nyc from 14.1.1 to 15.0.0

Bumps [nyc](https://github.com/istanbuljs/nyc) from 14.1.1 to 15.0.0. - [Release notes](https://github.com/istanbuljs/nyc/releases) - [Changelog](https://github.com/istanbuljs/nyc/blob/master/CHANGELOG.md) - [Commits](istanbuljs/nyc@v14.1.1...v15.0.0) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]