Update dependency hexo to v7 (#112)

* Update dependency hexo to v7

* Update package.json

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Mimi <1119186082@qq.com>

package.json

@@ -26,14 +26,15 @@
   },
   "homepage": "https://theme-next.js.org",
   "dependencies": {
-    "hexo": "6.3.0",
+    "hexo": "7.0.0",
     "hexo-generator-archive": "2.0.0",
     "hexo-generator-feed": "3.0.0",
     "hexo-generator-index": "3.0.0",
     "hexo-generator-searchdb": "1.4.1",
     "hexo-renderer-marked": "6.1.1",
     "hexo-renderer-stylus": "3.0.0",
     "hexo-server": "3.0.0",
+    "hexo-tag-embed": "1.0.0",
     "hexo-theme-next": "8.18.2"
   },
   "devDependencies": {