style: fix lint

Author: vkarpov15

test/document.test.js

@@ -12419,16 +12419,16 @@ describe('document', function() {
     const testSchema = new Schema({
       __stateBeforeSuspension: {
         field1: String,
-        field3: { type: Schema.Types.Mixed },
+        field3: { type: Schema.Types.Mixed }
       }
     });
     const Test = db.model('Test', testSchema);
-    let eventObj = new Test({
+    const eventObj = new Test({
       __stateBeforeSuspension: { field1: 'test' }
-    })
+    });
     await eventObj.save();
     const newO = eventObj.toObject();
-    newO.__stateBeforeSuspension.field3 = {'.ippo': 5};
+    newO.__stateBeforeSuspension.field3 = { '.ippo': 5 };
     eventObj.set(newO);
     await eventObj.save();