Add binary files support (#503)

package.json

@@ -25,6 +25,7 @@
     "github-markdown-css": "^5.5.0",
     "jdenticon": "^3.3.0",
     "nodemon": "^2.0.22",
+    "pdfobject": "^2.3.1",
     "postcss": "^8.4.32",
     "postcss-cli": "^11.0.0",
     "postcss-cssnext": "^3.1.1",