Update dependency form-data to v3

Author: renovate-bot

package-lock.json

@@ -11,7 +11,7 @@
   "typings": "typings/main.d.ts",
   "dependencies": {
     "@types/node": "^10.3.0",
-    "form-data": "2.5.1",
+    "form-data": "3.0.0",
     "isomorphic-fetch": "2.2.1",
     "tslib": "1.10.0",
     "workfront-api-constants": "2.0.0"