Update dependency sass-loader to v6.0.7

[renovate[bot]]

This Pull Request updates dependency sass-loader from v6.0.6 to v6.0.7

Release Notes

### [`v6.0.7`](https://github.com/webpack-contrib/sass-loader/releases/v6.0.7) ##### `Bug Fixes` * **package:** add `webpack >= v4.0.0` (`peerDependencies`) ([#​541](`https://github.com/webpack-contrib/sass-loader/issues/541`)) ([620bdd4](https://github.com/webpack-contrib/sass-loader/commit/620bdd4)) ##### `Performance Improvements` * use `neo-async` instead `async` ([#​538](`https://github.com/webpack-contrib/sass-loader/issues/538`)) ([fab89dc](https://github.com/webpack-contrib/sass-loader/commit/fab89dc)) ---

Commits

#### v6.0.7 - [`9e40b78`](https://github.com/webpack-contrib/sass-loader/commit/9e40b782f58b75ab7f2edaaead3fb0d10152632a) ci(travis): Update Node v4 test target to 4.8 - [`88b56d5`](https://github.com/webpack-contrib/sass-loader/commit/88b56d51e84445e5901d2b74f95f71851364391d) chore(package): update `clone-deep` v0.3.1...2.0.1 (#​512) - [`db01033`](https://github.com/webpack-contrib/sass-loader/commit/db010339f98cb6689f8b4bbffd737c3ed15fca91) docs(README): rephrase `resolve-url-loader` note (#​516) - [`a38344d`](https://github.com/webpack-contrib/sass-loader/commit/a38344d45bcaada9ea74cf80f5a4e5095220e1bc) docs(README): add example install instructions for dependencies (#​517) - [`620bdd4`](https://github.com/webpack-contrib/sass-loader/commit/620bdd4eb01ec34657852f57b532527a90b6311d) fix(package): add `webpack >= v4.0.0` (`peerDependencies`) (#​541) - [`fab89dc`](https://github.com/webpack-contrib/sass-loader/commit/fab89dc5aed24f914f76c28defec4b3407c23ba3) perf: use `neo-async` instead `async` (#​538) - [`44fe61c`](https://github.com/webpack-contrib/sass-loader/commit/44fe61c8280bdf72ce7c8207be91bdf020dab93a) chore(release): 6.0.7

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This PR has been generated by Renovate Bot.