fix: creating nested lib directory during build

.github/workflows/test-build-publish.yml

@@ -39,6 +39,7 @@ jobs:
         run: npm run build
       - name: Prepare artifact
         run: |
+          mkdir -p ./lib/lib &&
           mv ./lib/** ./lib/lib &&
           cp package.json README.md LICENSE ./lib
       - uses: actions/upload-artifact@v4