Upgrade: Bump hexo-generator-index from 2.0.0 to 3.0.0

Bumps [hexo-generator-index](https://github.com/hexojs/hexo-generator-index) from 2.0.0 to 3.0.0.
- [Release notes](https://github.com/hexojs/hexo-generator-index/releases)
- [Commits](hexojs/hexo-generator-index@2.0.0...v3.0.0)

---
updated-dependencies:
- dependency-name: hexo-generator-index
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Close #1084

Author: dependabot[bot]

package-lock.json

@@ -46,7 +46,7 @@
     "gulp-useref": "^5.0.0",
     "hexo": "^6.3.0",
     "hexo-cli": "^4.3.0",
-    "hexo-generator-index": "^2.0.0",
+    "hexo-generator-index": "^3.0.0",
     "hexo-generator-sitemap": "^3.0.1",
     "hexo-generator-tag": "^2.0.0",
     "hexo-renderer-handlebars": "^2.0.2",