Auto merge of #5611 - ember-cli:greenkeeper-fs-extra-0.26.6, r=kellyselden
Auto merge of #5611 - ember-cli:greenkeeper-fs-extra-0.26.6, r=kellyselden

Update fs-extra to version 0.26.6 🚀

Hello :wave:

:rocket::rocket::rocket:

[fs-extra](https://www.npmjs.com/package/fs-extra) just published its new version 0.26.6, 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 fs-extra – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

---
The new version differs by 30 commits .

- [`2b72bc3`](https://github.com/jprichardson/node-fs-extra/commit/2b72bc3f2b1272e3793d113029e696893edb2b6b) `0.26.6`
- [`3e16d38`](https://github.com/jprichardson/node-fs-extra/commit/3e16d387ab176e5c86c95fac467a702b3748b0e2) `Merge pull request #229 from daysv/master`
- [`ee02d2f`](https://github.com/jprichardson/node-fs-extra/commit/ee02d2fc00a110926e655460a94c344d45ad19e1) `fix 'TypeError: callback is not a function'`
- [`2de9f09`](https://github.com/jprichardson/node-fs-extra/commit/2de9f095503fee6e38dbab855796aa2e2f98ed30) `Merge pull request #222 from yetanotherusernamebecausegithubisbugged/patch-1`
- [`feb74e0`](https://github.com/jprichardson/node-fs-extra/commit/feb74e0a9137e8ef2ebdad3fcb33724105a1fd7e) `A clearer description of emtpyDir function`
- [`84a9c2c`](https://github.com/jprichardson/node-fs-extra/commit/84a9c2c7fbd12064940cf34732d5b67f380e7730) `Merge pull request #221 from Cellule/patch-1`
- [`8fe9d4d`](https://github.com/jprichardson/node-fs-extra/commit/8fe9d4d5fb7b656b2904dce3dfb9f1486e443968) `Update README.md`
- [`7e37a3c`](https://github.com/jprichardson/node-fs-extra/commit/7e37a3c7b830c405cf24d2c96d252af59601d89e) `Merge pull request #219 from marcjansen/patch-1`
- [`a6872b3`](https://github.com/jprichardson/node-fs-extra/commit/a6872b3f4a74db63c38b31fe25677d0072e7f969) `Add closing parenthesis in copySync example`
- [`4c44f48`](https://github.com/jprichardson/node-fs-extra/commit/4c44f48317845075ef59eb08df50f48fefb3ff5d) `0.26.5`
- [`02ca57c`](https://github.com/jprichardson/node-fs-extra/commit/02ca57c99a65d757d400b12d51eedaf821eaadda) `Merge pull request #215 from ioncreature/patch-1`
- [`beef585`](https://github.com/jprichardson/node-fs-extra/commit/beef585ed5c6f39447177fd8b58f7abdb6e3ee79) `fse.copy throws error when only src and dest provided`
- [`dc111de`](https://github.com/jprichardson/node-fs-extra/commit/dc111de48ac0cc0990c1ca0e75cac74f14dcb050) `Merge pull request #214 from ryanmurakami/master`
- [`b3ee155`](https://github.com/jprichardson/node-fs-extra/commit/b3ee155c126c47dc5bce6b3768dd9fddde6b47ca) `Fixing copySync anchor tag`
- [`5b16857`](https://github.com/jprichardson/node-fs-extra/commit/5b168579910d80101ed04b79c6401ae7c63ef323) `Merge pull request #212 from pra85/2016`

There are 30 commits in total. See the [full diff](https://github.com/jprichardson/node-fs-extra/compare/df7c7fd7f3d09929e81562a94db2d09d09b57a95...2b72bc3f2b1272e3793d113029e696893edb2b6b).

---
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