improve code style

CHANGELOG.md

@@ -6,3 +6,4 @@
 ## [2.0.1] - modify notification usage
 ## [2.0.2] - fix widget doesn't transform
 ## [2.0.3] - remove unnecessary task
+## [2.0.4] - improve code style

README-ZH.md

@@ -20,7 +20,7 @@
 
 Language: [English](README.md) | 中文简体
 
-[![null-safe](https://img.shields.io/badge/nullsafe-2.0.3-brightgreen)](https://pub.dev/packages/keframe)
+[![null-safe](https://img.shields.io/badge/nullsafe-2.0.4-brightgreen)](https://pub.dev/packages/keframe)
 [![null-safe](https://img.shields.io/badge/normal-1.0.3-brightgreen)](https://pub.dev/packages/keframe)
 [![GitHub stars](https://img.shields.io/github/stars/LianjiaTech/keframe)](https://github.com/LianjiaTech/keframe/stargazers)
 [![GitHub license](https://img.shields.io/github/license/LianjiaTech/keframe)](https://github.com/LianjiaTech/keframe/blob/master/LICENSE)

README.md

@@ -17,7 +17,7 @@
 
 Language: English | [中文简体](README-ZH.md)
 
-[![null-safe](https://img.shields.io/badge/nullsafe-2.0.3-brightgreen)](https://pub.dev/packages/keframe)
+[![null-safe](https://img.shields.io/badge/nullsafe-2.0.4-brightgreen)](https://pub.dev/packages/keframe)
 [![null-safe](https://img.shields.io/badge/normal-1.0.3-brightgreen)](https://pub.dev/packages/keframe)
 [![GitHub stars](https://img.shields.io/github/stars/LianjiaTech/keframe)](https://github.com/LianjiaTech/keframe/stargazers)
 [![GitHub license](https://img.shields.io/github/license/LianjiaTech/keframe)](https://github.com/LianjiaTech/keframe/blob/master/LICENSE)
@@ -75,7 +75,7 @@ Components distinguish only the normal and  null-safe versions
 
 The normal version uses : `1.0.3`
 
-The null-safe version uses ：`2.0.3`
+The null-safe version uses ：`2.0.4`
 
 
 #### Quick learning

pubspec.yaml

@@ -1,6 +1,6 @@
 name: keframe
 description: Helps you improve the fluency of Flutter's app for any scenario
-version: 2.0.3
+version: 2.0.4
 homepage: https://github.com/LianjiaTech/keframe
 
 environment: