fixup some missing devDependency entries

ui/challenge/package.json

@@ -9,6 +9,7 @@
   },
   "devDependencies": {
     "@build/tsProject": "^2",
+    "@build/cssProject": "^2",
     "@types/jquery": "^2.0",
     "@types/lichess": "1.0.0"
   }

ui/editor/package.json

@@ -21,20 +21,7 @@
   "homepage": "https://github.com/ornicar/lila",
   "devDependencies": {
     "@build/jsProject": "^2",
-    "breakpoint-sass": "^2.7.1",
-    "browser-sync": "^2.26.3",
-    "browserify": "^16",
-    "fancy-log": "^1",
-    "gulp": "^4",
-    "gulp-autoprefixer": "^6.0.0",
-    "gulp-rename": "^1.4.0",
-    "gulp-sass": "^4.0.2",
-    "gulp-size": "^3",
-    "gulp-sourcemaps": "^2.6.4",
-    "gulp-terser": "^1",
-    "vinyl-buffer": "^1",
-    "vinyl-source-stream": "^2",
-    "watchify": "^3"
+    "@build/cssProject": "^2"
   },
   "dependencies": {
     "chessground": "^7.6",

ui/notify/package.json

@@ -9,6 +9,7 @@
   },
   "devDependencies": {
     "@build/tsProject": "^2",
+    "@build/cssProject": "^2",
     "@types/jquery": "^2.0",
     "@types/lichess": "1.0.0"
   }

ui/site/package.json

@@ -9,6 +9,7 @@
   "author": "Thibault Duplessis",
   "license": "AGPL-3.0",
   "devDependencies": {
+    "@build/cssProject": "^2",
     "browserify": "^16",
     "gulp": "^4",
     "gulp-terser": "^1",

ui/tournament/package.json

@@ -20,6 +20,7 @@
   "homepage": "https://github.com/ornicar/lila",
   "devDependencies": {
     "@build/tsProject": "^2",
+    "@build/cssProject": "^2",
     "@types/jquery": "^2.0",
     "@types/lichess": "1.0.0"
   },