Auto merge of #5802 - ember-cli:greenkeeper-yam-0.0.19, r=Turbo87
Auto merge of #5802 - ember-cli:greenkeeper-yam-0.0.19, r=Turbo87

Update yam to version 0.0.19 🚀

Hello :wave:

:rocket::rocket::rocket:

[yam](https://www.npmjs.com/package/yam) just published its new version 0.0.19, which **is not covered by your current version range**.

If this pull request passes your tests you can publish your software with the latest version of yam – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

---
The new version differs by 3 commits .

- [`d8ae693`](https://github.com/twokul/yam/commit/d8ae6935a209206530022f1b2771660643ab9eb1) `Version bump`
- [`97e7db7`](https://github.com/twokul/yam/commit/97e7db7271084704cb39efd660b03da254660be2) `Merge pull request #11 from broerse/patch-1`
- [`7943a98`](https://github.com/twokul/yam/commit/7943a9898aeaeb1e5f11db9a1e02f5c53f90fe47) `Bump fs-extra version to ^0.26.6`

See the [full diff](https://github.com/twokul/yam/compare/0c950c8f443b0cdd90c6ced14b21156d7eb97012...d8ae6935a209206530022f1b2771660643ab9eb1).

---
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