[pom] Update assertj-core to 3.7.0
[pom] Update assertj-core to 3.7.0

hazendaz/spring,pboonphong/mybatis-spring,mybatis/spring,mosoft521/spring,hazendaz/spring,mosoft521/spring,mybatis/spring,kazuki43zoo/spring,pboonphong/mybatis-spring,kazuki43zoo/spring