Update dependency hexo to v7 (#66)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -33,7 +33,7 @@
     "chai": "4.4.1",
     "eslint": "8.6.0",
     "eslint-config-hexo": "5.0.0",
-    "hexo": "6.0.0",
+    "hexo": "7.1.1",
     "mocha": "10.4.0",
     "nyc": "15.1.0"
   },