Version bump; Polishing list elements (source on right); Security patches

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mopidy-iris",
-  "version": "3.56.1",
+  "version": "3.57.0",
   "description": "Mopidy HTTP interface",
   "repository": "https://github.com/jaedb/iris",
   "author": "James Barnsley <james@barnsley.nz>",
@@ -50,7 +50,7 @@
     "babel-plugin-add-module-exports": "^1.0.4",
     "babel-plugin-react-element-info": "^1",
     "copy-dir": "^1.3.0",
-    "css-loader": "^0.28.11",
+    "css-loader": "^3",
     "enzyme": "^3.11.0",
     "enzyme-adapter-react-16": "^1.15.5",
     "eslint": "^6.8.0",