Please, upgrade your dependencie

core-js@2.6.12: core-js@❤️.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Please, upgrade your dependencies to the actual version of core-js.
由于问题太多，不再维护3.3，也不推荐使用。由于V8引擎的怪想，旧core-js版本的特性检测可能会导致速度下降100倍，即使没有填充。请将你的依赖升级到core-js的实际版本。

解决办法

npm install npm@6.14.13  -g