fix(deps): update dependency sass-loader to v16

Author: renovate[bot]

package.json

@@ -46,7 +46,7 @@
     "react-markdown": "9.0.1",
     "react-slick": "0.30.2",
     "sass": "1.79.5",
-    "sass-loader": "14.2.1",
+    "sass-loader": "16.0.4",
     "select2": "4.0.13",
     "shpjs": "5.0.2",
     "slick-carousel": "git+https://github.com/liqd/slick#pm-2019-07-overwrites",