Update @rollup/plugin-terser to 1.0.0.

Resolves serialize-javascript vulnerability (GHSA-5c6j-r48x-rmvq).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mrdoob

package-lock.json

@@ -93,7 +93,7 @@
   "devDependencies": {
     "@eslint/js": "^9.0.0",
     "@rollup/plugin-node-resolve": "^16.0.0",
-    "@rollup/plugin-terser": "^0.4.0",
+    "@rollup/plugin-terser": "^1.0.0",
     "eslint": "^9.0.0",
     "eslint-config-mdcs": "^5.0.0",
     "eslint-plugin-compat": "^7.0.0",