Bump async from 3.2.0 to 3.2.2

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)

Closes gh-85

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

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