Bump fs-extra from 4.0.2 to 6.0.0

[dependabot-preview]

Bumps fs-extra from 4.0.2 to 6.0.0.

Changelog

Sourced from fs-extra's changelog.

6.0.0 / 2018-05-01

• Drop support for Node.js versions 4, 5, & 7 (#564)
• Rewrite move to use fs.rename where possible (#549)
• Don't convert relative paths to absolute paths for filter (#554)
• copy*'s behavior when preserveTimestamps is false has been OS-dependent since 5.0.0, but that's now explicitly noted in the docs (#563)
• Fix subdirectory detection for copy* & move* (#541)
• Handle case-insensitive paths correctly in copy* (#568)

5.0.0 / 2017-12-11

Significant refactor of copy() & copySync(), including breaking changes. No changes to other functions in this release.

Huge thanks to [manidlou](https://github.com/manidlou) for doing most of the work on this release.

• The filter option can no longer be a RegExp (must be a function). This was deprecated since fs-extra v1.0.0. #512
• copy()'s filter option can now be a function that returns a Promise. #518
• copy() & copySync() now use fs.copyFile()/fs.copyFileSync() in environments that support it (currently Node 8.5.0+). Older Node versions still get the old implementation. #505
• Don't allow copying a directory into itself. #83
• Handle copying between identical files. #198
• Error out when copying an empty folder to a path that already exists. #464
• Don't create dest's parent if the filter function aborts the copy() operation. #517
• Fix writeStream not being closed if there was an error in copy(). #516

4.0.3 / 2017-12-05

• Fix wrong chmod values in fs.remove() #501
• Fix TypeError on systems that don't have some fs operations like lchown #520

Commits

• 7d36349 6.0.0
• a240dd0 Add Node 10 to CI configs (#572)
• bbbc2db copy*(): refactor copyDirItems() to avoid passing null param (#570)
• b02eea6 Use strict assert in all tests (#569)
• da69c57 copy & copySync: handle case-insensitive paths, check paths stricter before c...
• eb4901b Add docs that graceful-fs is used (#567)
• 20c82ab Run stricter linter to cleanup problems and force ES6 usage (#566)
• a631c53 BREAKING: Drop builds for Node 4, 5, & 7; add OSX builds & Node 9 (#564)
• 1018584 Upgrade devDeps
• bacf504 Merge pull request #563 from jprichardson/copy-preserve-timestamps-false
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Note: This repo was added to Dependabot recently, so you'll receive a maximum of 5 PRs for your first few update runs. Once an update run creates fewer than 5 PRs we'll remove that limit.

You can always request more updates by clicking Bump now in your Dependabot dashboard.

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot ignore this [minor|major] version will close this PR and stop Dependabot creating any more for this minor/major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot use [this|these] label[s] will set the current labels as the default for future PRs for this repo and language

Additionally, you can set the following in your Dependabot dashboard:

• Update frequency (including time of day and day of week)
• Automerge options (never/patch/minor, and dev/runtime dependencies)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)

Finally, you can contact us by mentioning @dependabot.

[dependabot-preview]

Superseded by #52.