Bump dotenv from 6.2.0 to 8.0.0 (#10888)

Bumps [dotenv](https://github.com/motdotla/dotenv) from 6.2.0 to 8.0.0.
- [Release notes](https://github.com/motdotla/dotenv/releases)
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](https://github.com/motdotla/dotenv/compare/v6.2.0...v8.0.0)