Python v0.4.2

What's Changed

Release note (#680)

• feat-pyproxyV2 (#674) @Alex-TG001
• feat-multi_stress_test2.0 (#675) @Alex-TG001
• 修复压测工具中判断端口是否被占用时可能不生效的问题 (#677) @sujubaima
• feat[trainer]: 支持chat_completion调用ERNIE-Functions-8K (#678) @danielhjz
• refactor[trainer]: 修改动态TrainConfig懒加载 & 新增Trainer 命令行查看trainer任务信息 (#679) @danielhjz
• feat[resource]: api update (#683) @danielhjz

Full Changelog: py/v0.4.1.2...py/v0.4.2