Add form-data dependency

Depend on form-data ^2.5.1

Author: phillmac

package.json

@@ -57,6 +57,7 @@
     "err-code": "^2.0.0",
     "explain-error": "^1.0.4",
     "flatmap": "0.0.3",
+    "form-data": "^2.5.1",
     "fs-extra": "^8.1.0",
     "glob": "^7.1.3",
     "ipfs-block": "~0.8.1",