package.json: move dayjs to devDependencies

It is not used by server or shared parts.

package-lock.json

@@ -6759,7 +6759,8 @@
     "dayjs": {
       "version": "1.8.36",
       "resolved": "https://registry.npmjs.org/dayjs/-/dayjs-1.8.36.tgz",
-      "integrity": "sha512-3VmRXEtw7RZKAf+4Tv1Ym9AGeo8r8+CjDi26x+7SYQil1UqtqdaokhzoEJohqlzt0m5kacJSDhJQkG/LWhpRBw=="
+      "integrity": "sha512-3VmRXEtw7RZKAf+4Tv1Ym9AGeo8r8+CjDi26x+7SYQil1UqtqdaokhzoEJohqlzt0m5kacJSDhJQkG/LWhpRBw==",
+      "dev": true
     },
     "debug": {
       "version": "4.1.1",

package.json

@@ -40,7 +40,6 @@
     "chalk": "^4.1.0",
     "compression": "^1.7.3",
     "cookie-parser": "^1.4.5",
-    "dayjs": "^1.8.36",
     "debug": "^4.1.1",
     "deep-equal": "^2.0.3",
     "express": "^4.17.1",
@@ -105,6 +104,7 @@
     "clipboard": "^2.0.6",
     "css-loader": "^4.3.0",
     "d3": "^6.1.1",
+    "dayjs": "^1.8.36",
     "eslint": "^7.9.0",
     "eslint-config-airbnb": "^18.2.0",
     "eslint-config-airbnb-typescript": "^10.0.0",