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](https://github.com/hexojs/hexo/compare/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] <support@github.com>

package.json

@@ -12,7 +12,7 @@
   },
   "dependencies": {
     "bulma-stylus": "0.8.0",
-    "hexo": "^6.2.0",
+    "hexo": "^7.0.0",
     "hexo-component-inferno": "^2.0.3",
     "hexo-deployer-git": "^4.0.0",
     "hexo-generator-archive": "^2.0.0",