chore: bump hexo-front-matter from 3.0.0 to 4.0.0 (#5087)

Bumps [hexo-front-matter](https://github.com/hexojs/hexo-front-matter) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/hexojs/hexo-front-matter/releases)
- [Commits](hexojs/hexo-front-matter@3.0.0...v4.0.0)

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

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package.json

@@ -43,7 +43,7 @@
     "archy": "^1.0.0",
     "bluebird": "^3.7.2",
     "hexo-cli": "^4.3.0",
-    "hexo-front-matter": "^3.0.0",
+    "hexo-front-matter": "^4.0.0",
     "hexo-fs": "^4.0.0",
     "hexo-i18n": "^1.0.0",
     "hexo-log": "^3.2.0",