update theme-mu composer target branch and auto-format [skip ci]

Author: mlwilkerson

integrations/themes/theme-mu/composer.json

@@ -1,7 +1,14 @@
 {
   "name": "fortawesome/wordpress-theme-mu",
   "description": "Example integration of a WordPress theme using the Font Awesome WordPress composer package.",
-  "keywords": [ "font awesome", "font-awesome", "icon", "icons", "webfont", "svg" ],
+  "keywords": [
+    "font awesome",
+    "font-awesome",
+    "icon",
+    "icons",
+    "webfont",
+    "svg"
+  ],
   "homepage": "https://fontawesome.com",
   "license": "GPL-2.0-or-later",
   "authors": [
@@ -18,6 +25,6 @@
     }
   ],
   "require": {
-    "fortawesome/wordpress-fontawesome": "dev-master"
+    "fortawesome/wordpress-fontawesome": "dev-main"
   }
 }