Update async from ^2.5.0 to 3.1.1

Author: dependencies-bot

packages/oc-s3-storage-adapter/package.json

@@ -27,7 +27,7 @@
   },
   "license": "MIT",
   "dependencies": {
-    "async": "^2.5.0",
+    "async": "3.1.1",
     "aws-sdk": "^2.184.0",
     "fs-extra": "8.1.0",
     "lodash": "^4.17.4",