chore(deps): update dependency fs-extra to v8

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
fs-extra	dependencies	major	^7.0.1 -> ^8.0.0	source

---

Release Notes

jprichardson/node-fs-extra

### [`v8.0.0`](https://togithub.com/jprichardson/node-fs-extra/blob/master/CHANGELOG.md#​800--2019-05-11) [Compare Source](https://togithub.com/jprichardson/node-fs-extra/compare/7.0.1...8.0.0) **NOTE:** Node.js v6 support is deprecated, and will be dropped in the next major release. - Use `renameSync()` under the hood in `moveSync()` - Fix bug with bind-mounted directories in `copy*()` ([#​613](https://togithub.com/jprichardson/node-fs-extra/issues/613), [#​618](https://togithub.com/jprichardson/node-fs-extra/pull/618)) - Fix bug in `move()` with case-insensitive file systems - Use `fs.stat()`'s `bigint` option in `copy*()` & `move*()` where possible ([#​657](https://togithub.com/jprichardson/node-fs-extra/issues/657))

---

Renovate configuration

:date: Schedule: At any time (no schedule defined).

:vertical_traffic_light: Automerge: Disabled by config. Please merge this manually once you are satisfied.

:recycle: Rebasing: Whenever PR becomes conflicted, or if you modify the PR title to begin with "rebase!".

:no_bell: Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Renovate Bot. View repository job log here.

[codecov[bot]]

Codecov Report

Merging #48 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #48   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      2           
  Lines          50     50           
  Branches        7      7           
=====================================
  Hits           50     50

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 5ddf6d3...32accb9. Read the comment docs.