Build: Bump async from 3.2.0 to 3.2.2 (#225)

Bumps [async](https://github.com/caolan/async) from 3.2.0 to 3.2.2.
- [Release notes](https://github.com/caolan/async/releases)
- [Changelog](https://github.com/caolan/async/blob/master/CHANGELOG.md)
- [Commits](caolan/async@v3.2.0...v3.2.2)

---
updated-dependencies:
- dependency-name: async
  dependency-type: direct:production
...

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Author: dependabot[bot]

package-lock.json

@@ -20,7 +20,7 @@
     }
   ],
   "dependencies": {
-    "async": "3.2.0",
+    "async": "3.2.2",
     "grunt": "1.4.0",
     "grunt-cli": "1.4.2",
     "grunt-jquery-content": "3.1.0"