Bump hexo from 6.3.0 to 7.1.1

Bumps [hexo](https://github.com/hexojs/hexo) from 6.3.0 to 7.1.1.
- [Release notes](https://github.com/hexojs/hexo/releases)
- [Commits](hexojs/hexo@6.3.0...v7.1.1)

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

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

Author: dependabot[bot]

package.json

@@ -15,7 +15,7 @@
   },
   "dependencies": {
     "@renbaoshuo/markdown-it-katex": "^2.0.2",
-    "hexo": "^6.3.0",
+    "hexo": "^7.1.1",
     "hexo-generator-archive": "^2.0.0",
     "hexo-generator-category": "^2.0.0",
     "hexo-generator-feed": "^3.0.0",