Update code to use the latest Node.js LTS version (16)

Author: fabpot

README.md

@@ -9,6 +9,7 @@ Requirements
 
   * PHP 8.0.2 or higher;
   * PDO-SQLite PHP extension enabled;
+  * Node.js 16+
   * and the [usual Symfony application requirements][2].
 
 Installation

package.json

@@ -13,8 +13,8 @@
         "imports-loader": "^0.8.0",
         "jquery": "^3.5.1",
         "lato-font": "^3.0.0",
-        "node-sass": "^4.9.3",
-        "sass-loader": "^9.0.1",
+        "node-sass": "^6.0",
+        "sass-loader": "^12.3",
         "typeahead.js": "^0.11.1",
         "regenerator-runtime": "^0.13.2",
         "stimulus": "^2.0.0",