chore(deps-dev): bump gulp-sass from 3.1.0 to 4.0.2

Bumps [gulp-sass](https://github.com/dlmanning/gulp-sass) from 3.1.0 to 4.0.2.
- [Release notes](https://github.com/dlmanning/gulp-sass/releases)
- [Changelog](https://github.com/dlmanning/gulp-sass/blob/master/CHANGELOG.md)
- [Commits](dlmanning/gulp-sass@v3.1.0...v4.0.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -95,7 +95,7 @@
     "gulp-pug": "3.3.0",
     "gulp-rename": "1.2.2",
     "gulp-replace": "0.5.4",
-    "gulp-sass": "3.1.0",
+    "gulp-sass": "4.0.2",
     "gulp-shell": "^0.6.5",
     "gulp-sourcemaps": "^2.6.4",
     "gulp-svgmin": "1.2.3",