🔖 release v1.3.9

## 1.3.9

- [FIX] make `encode.objKeys` late final to ensure immutability

Author: techouse

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.3.9
+
+- [FIX] make `encode.objKeys` late final to ensure immutability
+
 ## 1.3.8
 
 - [FIX] enforce non-nullable `serializeDate` in `EncodeOptions`

pubspec.yaml

@@ -1,6 +1,6 @@
 name: qs_dart
 description: A query string encoding and decoding library for Dart. Ported from qs for JavaScript.
-version: 1.3.8
+version: 1.3.9
 homepage: https://techouse.github.io/qs/
 repository: https://github.com/techouse/qs
 documentation: https://pub.dev/documentation/qs_dart/latest/