Use latest MapLibre Style Spec (#2756)

package.json

@@ -7,6 +7,7 @@
   "main": "index.js",
   "license": "BSD-2-Clause",
   "dependencies": {
+    "@maplibre/maplibre-gl-style-spec": "^20.3.1",
     "minimatch": "^9.0.4",
     "npm-run-all": "^4.1.5",
     "simple-git": "^3.25.0"
@@ -44,6 +45,8 @@
     "typescript": "^5.4.5",
     "xcode": "^3.0.1"
   },
-  "scripts": {},
+  "scripts": {
+    "copy-style-spec": "cp node_modules/@maplibre/maplibre-gl-style-spec/dist/latest.json scripts/style-spec-reference/v8.json"
+  },
   "type": "module"
 }