fix: Duplicate pending operations on nested fields (#2162)

Author: dplewis

src/ParseObject.ts

@@ -482,7 +482,12 @@ class ParseObject {
         json[attr] = encode(attrs[attr], false, false, seen, offline);
       }
     }
-
+    const pending = this._getPendingOps();
+    for (const attr in pending[0]) {
+      if (attr.indexOf('.') < 0) {
+        json[attr] = pending[0][attr].toJSON(offline);
+      }
+    }
     if (this.id) {
       json.objectId = this.id;
     }