Bump junit from 4.7 to 4.13.1

Bumps [junit](https://github.com/junit-team/junit4) from 4.7 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.13.1.md)
- [Commits](https://github.com/junit-team/junit4/compare/r4.7...r4.13.1)

Signed-off-by: dependabot[bot] <support@github.com>

README.md

@@ -1,7 +1,7 @@
 
 新版本已出，强烈推荐：https://github.com/zhangdaiscott/jeecg-boot
 
-==============================================================
+======================================================================================
 
 
 ![JEECG](https://static.oschina.net/uploads/img/201905/24184932_ak9D.png "Jeecg快速开发平台")

pom.xml

@@ -36,7 +36,7 @@
 		<slf4j.version>1.6.1</slf4j.version>
         
 		<!-- 测试依赖包 -->
-		<junit.version>4.7</junit.version>
+		<junit.version>4.13.1</junit.version>
         <hamcrest.version>1.3</hamcrest.version>
         
         <!-- 辅助依赖包 -->