feat(deps): bump standard-version from 6.0.1 to 7.0.0 (#456)

Bumps [standard-version](https://github.com/conventional-changelog/standard-version) from 6.0.1 to 7.0.0.
- [Release notes](https://github.com/conventional-changelog/standard-version/releases)
- [Changelog](https://github.com/conventional-changelog/standard-version/blob/master/CHANGELOG.md)
- [Commits](conventional-changelog/standard-version@v6.0.1...v7.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>