Test on Node 21

Author: voxpelli

.github/workflows/nodejs.yml

@@ -17,4 +17,4 @@ jobs:
   test:
     uses: voxpelli/ghatemplates/.github/workflows/test.yml@main
     with:
-      node-versions: '16,18,20'
+      node-versions: '16,18,20,21'