move nuxt-build-optimization into devDeps

package.json

@@ -50,7 +50,6 @@
     "microformat-node": "^2.0.1",
     "mkdirp": "^1.0.4",
     "multer": "^1.4.3",
-    "nuxt-build-optimisations": "^1.0.7",
     "nuxt-edge": "^2.16.0-27226092.034b9901",
     "nuxt-express-module": "^0.0.11",
     "pg": "^8.6.0",
@@ -75,6 +74,7 @@
     "@mdi/font": "^6.3.95",
     "@nuxtjs/vuetify": "^1.12.1",
     "less": "^4.1.1",
+    "nuxt-build-optimisations": "^1.0.7",
     "less-loader": "^7",
     "prettier": "^2.3.0",
     "pug": "^3.0.2",