Bump hexo from 7.0.0-rc1 to 7.0.0-rc2 (#5)

Bumps [hexo](https://github.com/hexojs/hexo) from 7.0.0-rc1 to 7.0.0-rc2.
- [Release notes](https://github.com/hexojs/hexo/releases)
- [Commits](hexojs/hexo@v7.0.0-rc1...v7.0.0-rc2)

---
updated-dependencies:
- dependency-name: hexo
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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