fix: upgrade async from 3.2.3 to 3.2.4

Snyk has created this PR to upgrade async from 3.2.3 to 3.2.4.

See this package in npm:
https://www.npmjs.com/package/async

See this project in Snyk:
https://app.snyk.io/org/runtime-3by/project/3af2d020-78e9-4846-9064-bd2167f7613f?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -39,7 +39,7 @@
   "dependencies": {
     "@kubernetes/client-node": "^0.15.1",
     "@snyk/dep-graph": "^1.30.0",
-    "async": "^3.2.3",
+    "async": "^3.2.4",
     "aws-sdk": "^2.1148.0",
     "bunyan": "^1.8.15",
     "child-process-promise": "^2.2.1",