zip download of single pdfs

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pdf-tools",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "private": true,
   "type": "module",
   "scripts": {
@@ -16,6 +16,7 @@
     "check": "npm run typecheck && npm run lint && npm run test && npm run build"
   },
   "dependencies": {
+    "fflate": "^0.8.3",
     "pdf-lib": "^1.17.1",
     "pdfjs-dist": "^5.7.284",
     "react": "^19.2.6",