fix(deps): move @eslint/css from devDependencies to dependencies (#899)

Author: nus3

package-lock.json

@@ -28,7 +28,6 @@
   "author": "cybozu",
   "license": "MIT",
   "devDependencies": {
-    "@eslint/css": "^0.10.0",
     "@types/react": "^18.3.23",
     "eslint": "^9.31.0",
     "mocha": "^11.7.1",
@@ -43,6 +42,7 @@
     "typescript": ">=4.7.5 || ^5.0.0"
   },
   "dependencies": {
+    "@eslint/css": "^0.10.0",
     "@eslint/js": "^9.31.0",
     "@stylistic/eslint-plugin-ts": "^3.1.0",
     "@typescript-eslint/eslint-plugin": "^8.38.0",