[SM-204] Add the `curly` eslint rule (#3464)

.eslintrc.json

@@ -64,6 +64,7 @@
         "message": "Calling `svgIcon` directly is not allowed",
         "selector": "CallExpression[callee.name='svgIcon']"
       }
-    ]
+    ],
+    "curly": ["error", "all"]
   }
 }

apps/browser/src/content/message_handler.ts

@@ -1,7 +1,9 @@
 window.addEventListener(
   "message",
   (event) => {
-    if (event.source !== window) return;
+    if (event.source !== window) {
+      return;
+    }
 
     if (event.data.command && event.data.command === "authResult") {
       chrome.runtime.sendMessage({