add node 16 support

using node-sass (native, deprecated) instead of sass (dart)
because it's twice as fast

package.json

@@ -18,7 +18,7 @@
   },
   "homepage": "https://lichess.org",
   "engines": {
-    "node": ">=10 <16",
+    "node": ">=10 <=16",
     "yarn": "^1"
   },
   "dependencies": {

ui/build

@@ -8,7 +8,7 @@ nodever="$(node --version)"
 echo "node: $nodever"
 echo "yarn: $(yarn --version)"
 
-[[ "$nodever" =~ ^v1[0-5]\.[0-9]+\.[0-9]+$ ]] || { echo "Node version >=10 and <16 required. Found: $nodever"; exit 1; }
+[[ "$nodever" =~ ^v1[0-6]\.[0-9]+\.[0-9]+$ ]] || { echo "Node version >=10 and <=16 required. Found: $nodever"; exit 1; }
 
 cd "$(git rev-parse --show-toplevel)"
 

ui/gulpfile.js

@@ -1,5 +1,5 @@
 const gulp = require('gulp');
-const sass = require('gulp-sass');
+const sass = require('gulp-sass')(require('node-sass'));
 const sourcemaps = require('gulp-sourcemaps');
 const autoprefixer = require('gulp-autoprefixer');
 const sassInheritance = require('gulp-sass-inheritance');

ui/package.json

@@ -8,9 +8,7 @@
   ],
   "author": "Thibault Duplessis",
   "license": "AGPL-3.0-or-later",
-  "dependencies": {
-    "breakpoint-sass": "^2.7.1"
-  },
+  "dependencies": {},
   "devDependencies": {
     "glob": "^7.1.3",
     "gulp": "^4.0.2",
@@ -19,8 +17,10 @@
     "gulp-filter": "^7.0.0",
     "gulp-if": "^3.0.0",
     "gulp-rename": "^2.0.0",
-    "gulp-sass": "^4.1.0",
+    "node-sass": "^6",
+    "gulp-sass": "^5.0.0",
     "gulp-sass-inheritance": "^1.1",
+    "breakpoint-sass": "^2.7.1",
     "gulp-size": "^4.0.1",
     "gulp-sourcemaps": "^3.0.0"
   }