报错： Could not load TestContextBootstrapper
解决方案：spring-test的版本必须和spring-core的版本一致不然就会出现依赖冲突
artifact: https://mvnrepository.com/artifact/org.springframework/spring-test/5.2.8.RELEASE
相关文章： https://stackoverflow.com/questions/28013452/could-not-load-testcontextbootstrapper-spring-unit-testing
