An in-range update of async is breaking the build 🚨

[greenkeeper[bot]]

Version 2.1.5 of async just got published.

Branch	Build failing 🚨
Dependency	async
Current Version	2.1.4
Type	devDependency

This version is covered by your current version range and after updating it in your project the build failed.

As async is “only” a devDependency of this project it might not break production or downstream projects, but “only” your build or test tools – preventing new deploys or publishes.

I recommend you give this issue a high priority. I’m sure you can resolve this :muscle:

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Status Details

- ✅ **semaphoreci** The build passed on Semaphore. [Details](https://semaphoreci.com/nodeos/nodeos-cross-toolchain/branches/greenkeeper-async-2-1-5/builds/1) - ❌ **continuous-integration/travis-ci/push** The Travis CI build could not complete due to an error [Details](https://travis-ci.org/NodeOS/nodeos-cross-toolchain/builds/203062746)

Not sure how things should work exactly?

There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html) and of course you may always [ask my humans](https://github.com/greenkeeperio/greenkeeper/issues/new).

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