Bump hexo from 6.3.0 to 7.0.0

Bumps [hexo](https://github.com/hexojs/hexo) from 6.3.0 to 7.0.0.
- [Release notes](https://github.com/hexojs/hexo/releases)
- [Commits](hexojs/hexo@6.3.0...v7.0.0)

---
updated-dependencies:
- dependency-name: hexo
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>