Apply new ESLint rules to legacy code

js/modules/debug.js

@@ -111,20 +111,22 @@ const createRandomMessage = async ({ conversationId } = {}) => {
 const _createMessage = ({ commonProperties, conversationId, type } = {}) => {
   switch (type) {
     case 'incoming':
-      return Object.assign({}, commonProperties, {
+      return {
+        ...commonProperties,
         flags: 0,
         source: conversationId,
         sourceDevice: 1,
-      });
+      };
     case 'outgoing':
-      return Object.assign({}, commonProperties, {
+      return {
+        ...commonProperties,
         delivered: 1,
         delivered_to: [conversationId],
         expireTimer: 0,
         recipients: [conversationId],
         sent_to: [conversationId],
         synced: true,
-      });
+      };
     default:
       throw new TypeError(`Unknown message type: '${type}'`);
   }