chore(deps): update dependency lint-staged to v8

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
lint-staged	devDependencies	major	7.3.0 -> 8.0.0	source

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Release Notes

okonet/lint-staged

### [`v8.0.0`](https://renovatebot.com/gh/okonet/lint-staged/releases/v8.0.0) [Compare Source](https://renovatebot.com/gh/okonet/lint-staged/compare/v7.3.0...v8.0.0) ### [8.0.0](http://git+https/github.com/okonet/lint-staged/compare/v7.3.0...v8.0.0) (2018-10-29) ##### Features - Add support for partially staged files ([#​75](http://git+https/github.com/okonet/lint-staged/issues/75)) ([f82443c](http://git+https/github.com/okonet/lint-staged/commit/f82443c)), closes [#​62](http://git+https/github.com/okonet/lint-staged/issues/62) ##### BREAKING CHANGES - Node >= 8.6 is required

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[warrenv]

Failing verification.

[renovate[bot]]

Renovate Ignore Notification

As this PR has been closed unmerged, Renovate will ignore this upgrade and you will not receive PRs for any future 8.x releases. However, if you upgrade to 8.x manually then Renovate will then reenable updates for minor and patch updates automatically.

If this PR was closed by mistake or you changed your mind, you can simply rename this PR and you will soon get a fresh replacement PR opened.