chore(package): update @types/form-data to version 2.2.1

Author: greenkeeper[bot]

package.json

@@ -22,7 +22,7 @@
     "workfront-api-constants": "2.0.0"
   },
   "devDependencies": {
-    "@types/form-data": "2.2.0",
+    "@types/form-data": "2.2.1",
     "@types/mocha": "2.2.44",
     "codecov": "2.3.1",
     "dateformat": "3.0.1",