fix: only inject webpack hot client in webpack4 #986
Merged
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webpack5 和 webpack4 stat 信息中 error 的格式不同,导致 webpack5 如果注入低版本的 react-dev-utils/webpackHotClient 在用户构建有 warning 时报错阻塞项目运行,同时由于 webpack5 本身已经内置了相关能力,所以可以在 webpack5 的时候不注入该代码