Bump @types/mocha from 8.0.3 to 8.0.4 (#80)

Bumps [@types/mocha](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/mocha) from 8.0.3 to 8.0.4.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/mocha)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>