Update dependency form-data to v4

Author: renovate[bot]

docker/client/rundeck-cli/package.json

@@ -12,7 +12,7 @@
     "@types/js-yaml": "^3.12.3",
     "@types/node": "^13.13.5",
     "dotenv": "^10.0.0",
-    "form-data": "^3.0.0",
+    "form-data": "^4.0.0",
     "js-yaml": "^3.13.1",
     "node-fetch": "^2.6.1",
     "ts-node": "^8.10.1",