Build(deps-dev): Bump gulp-sass from 5.1.0 to 6.0.1

Bumps [gulp-sass](https://github.com/dlmanning/gulp-sass) from 5.1.0 to 6.0.1.
- [Release notes](https://github.com/dlmanning/gulp-sass/releases)
- [Changelog](https://github.com/dlmanning/gulp-sass/blob/master/CHANGELOG.md)
- [Commits](dlmanning/gulp-sass@v5.1.0...v6.0.1)

---
updated-dependencies:
- dependency-name: gulp-sass
  dependency-version: 6.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -44,7 +44,7 @@
     "gulp-less": "5.0.0",
     "gulp-rename": "2.0.0",
     "gulp-replace": "^1.1.4",
-    "gulp-sass": "5.1.0",
+    "gulp-sass": "6.0.1",
     "gulp-strip-comments": "^2.5.2",
     "gulp-uglify": "3.0.2",
     "gulp-uglifycss": "1.1.0",