Hippo4J v1.2.1 已经发布，动态可观测线程池框架
此版本更新内容包括：
hippo4j core & server 1.2.0 可平滑升级。
BugFix
- https://github.com/longtai-cn/hippo4j/issues/162 apollo动态配置不生效
- https://github.com/longtai-cn/hippo4j/pull/172 修复 hippo4j-core 后置处理器创建线程池问题
- https://github.com/longtai-cn/hippo4j/issues/177 重构 hippo4j-core spring 后置处理器逻辑
- https://github.com/longtai-cn/hippo4j/issues/188 优化ThreadPoolNotifyAlarmHandler下的空指针异常
- https://github.com/longtai-cn/hippo4j/issues/190 修复线程池核心、最大线程数变更问题
- https://github.com/longtai-cn/hippo4j/issues/210 startup.cmd 未正常读取 conf 配置文件
Optimize
- https://github.com/longtai-cn/hippo4j/issues/166 配置文件中字段歧义
- https://github.com/longtai-cn/hippo4j/issues/173 修改代码中历史网址
- https://github.com/longtai-cn/hippo4j/issues/181 InstanceInfo 的 groupKey 参数重复设置
- https://github.com/longtai-cn/hippo4j/issues/193 ConfigFileTypeEnum 枚举字段添加注释
- https://github.com/longtai-cn/hippo4j/issues/194 线程资源通过线程池创建，不允许自行显示创建线程
- https://github.com/longtai-cn/hippo4j/issues/195 Guava 版本升级至 30.0-jre 及以上版本
- https://github.com/longtai-cn/hippo4j/issues/204 SystemClock 替换 System.currentTimeMillis()
- https://github.com/longtai-cn/hippo4j/issues/205 添加代码格式化插件 Spotless
- https://github.com/longtai-cn/hippo4j/issues/214 修改线程池文案