the parent pom of easy-retrofit, Any mainstream Java web framework extension(starter) needs to inherit this file
从3.0.0 开始, parent pom移除了如下配置, 以避免retrofit升级导致的parent文件升级
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>retrofit</artifactId>
<version>${retrofit.version}</version>
</dependency>
</dependencies>
</dependencyManagement>