Switched to new version of sass

Signed-off-by: Jim Martens <github@2martens.de>

package.json

@@ -21,12 +21,13 @@
     "gulp-notify": "^3.2.0",
     "gulp-postcss": "^8.0.0",
     "gulp-rename": "^1.4.0",
-    "gulp-ruby-sass": "^4.0.0",
     "gulp-run": "^1.7.1",
+    "gulp-sass": "^4.0.2",
     "gulp-sourcemaps": "^2.6.5",
     "gulp-terser": "^1.1.7",
     "gulp-util": "^3.0.8",
-    "micromatch": "^3.1.10"
+    "micromatch": "^3.1.10",
+    "node-sass": "^4.11.0"
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"