Now building scss within the content processor

package.json

@@ -55,9 +55,7 @@
     "gulp-concat": "~2.6.1",
     "gulp-filter": "~6.0.0",
     "gulp-minify": "~3.1.0",
-    "gulp-postcss": "~8.0.0",
     "gulp-rev": "~9.0.0",
-    "gulp-sass": "~4.0.2",
     "handlebars": "~4.7.3",
     "hbs-kit": "~1.2.0",
     "html-minifier-terser": "~5.0.4",
@@ -76,6 +74,7 @@
     "plugin-error": "~1.0.1",
     "png-to-ico": "~2.0.6",
     "popper.js": "~1.16.0",
+    "postcss": "~7.0.27",
     "rev-hash": "~3.0.0",
     "rev-path": "~2.0.0",
     "rollup": "~1.31.1",