Bump hexo from 5.4.2 to 7.2.0

Bumps [hexo](https://github.com/hexojs/hexo) from 5.4.2 to 7.2.0.
- [Release notes](https://github.com/hexojs/hexo/releases)
- [Commits](hexojs/hexo@5.4.2...v7.2.0)

---
updated-dependencies:
- dependency-name: hexo
  dependency-version: 7.2.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]