Update dependency sass-loader to v6.0.7

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sass-loader	6.0.2 -> 6.0.7

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Release Notes

webpack-contrib/sass-loader (sass-loader)

v6.0.7

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Bug Fixes

• package: add webpack >= v4.0.0 (peerDependencies) (#​541) (620bdd4)

Performance Improvements

• use neo-async instead async (#​538) (fab89dc)

v6.0.6

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Chore

• Adds Webpack 3.x version range to peerDependencies

v6.0.5

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Bug Fixes

• importing file directly from scoped npm package #​450 (5d06e9d)

v6.0.4

Compare Source

Bug Fixes

• fix: Resolving of scoped npm packages #​447

v6.0.3

Compare Source

Bug Fixes

• Fix regression with empty files #​398

Chore

• Reduce npm package size by using the files property in the package.json

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⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

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The artifact failure details are included below:

File name: yarn.lock

warning package-lock.json found. Your project contains lock files generated by tools other than Yarn. It is advised not to mix package managers in order to avoid resolution inconsistencies caused by unsynchronized lock files. To clear this warning, remove package-lock.json.
error Can't add "websocket": invalid package version undefined.