Update to node20

- updates many dependencies
- removes @nuxtjs/tailwindcss and postcss8
- pkg targets are using node18 until node20 targets are available

client/package.json

@@ -23,7 +23,7 @@
     "epubjs": "^0.3.88",
     "hls.js": "^1.0.7",
     "libarchive.js": "^1.3.0",
-    "nuxt": "^2.15.8",
+    "nuxt": "^2.17.3",
     "nuxt-socket-io": "^1.1.18",
     "trix": "^1.3.1",
     "v-click-outside": "^3.1.2",
@@ -31,11 +31,9 @@
     "vuedraggable": "^2.24.3"
   },
   "devDependencies": {
-    "@nuxt/postcss8": "^1.1.3",
     "@nuxtjs/pwa": "^3.3.5",
-    "@nuxtjs/tailwindcss": "^4.2.1",
     "autoprefixer": "^10.4.7",
     "postcss": "^8.3.6",
-    "tailwindcss": "^3.1.4"
+    "tailwindcss": "^3.4.1"
   }
-}
+}