site: Update website deps

site/package.json

@@ -1,24 +1,7 @@
 {
-  "name": "tech-doc-hugo",
-  "version": "0.0.1",
-  "description": "Hugo theme for technical documentation.",
-  "main": "none.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/bep/tech-doc-hugo.git"
-  },
-  "author": "",
-  "license": "ISC",
-  "bugs": {
-    "url": "https://github.com/bep/tech-doc-hugo/issues"
-  },
-  "homepage": "https://github.com/bep/tech-doc-hugo#readme",
-  "dependencies": {},
+  "private": true,
   "devDependencies": {
-    "autoprefixer": "^9.4.6",
-    "postcss-cli": "^5.0.1"
+    "autoprefixer": "^10.4.15",
+    "postcss-cli": "^10.1.0"
   }
 }