Adjustments in the README.

Author: douglasrafael

README.md

@@ -47,22 +47,22 @@ app.get('/', (req, res) => {
 #### The middleware uses the following defaults:
 ```js
 options = {
+    use_page: false,
+    client_db: 'mongodb',
+    date_field: {
+      start_at: 'created_at',
+      end_at: 'created_at'
+    },
     default: {
+        fields: {},
+        sort: {},
+        filters: {},
         pagination: {
             limit: Number.MAX_SAFE_INTEGER,
             skip: 0,
             page: 1
-        },
-        fields: {},
-        sort: {},
-        filters: {}
-    },
-    use_page: false,
-    client_db: 'mongodb',
-    date_field: date_field: {
-      start_at: 'created_at',
-      end_at: 'created_at'
-  }
+        }        
+    }    
 }
 ```
 If the options are not provided, the default values will be used for the treatment of queries strings.
@@ -80,7 +80,7 @@ app.use(qs({
   date_field: {
       start_at: 'timestamp',
       end_at: 'timestamp'
-  }
+  },
   default: {
       fields: {name: 1 , age: 1, number: 1, _id: 0},
       sort: { created_at: 'desc' },