这是官方留档https://classic.yarnpkg.com/en/docs/cli/upgrade没有关键字降级到特定version.you必须使用升级关键字为两者

yarn upgrade package@version

例如

yarn upgrade @types/express-session@^1.15.16 

您可以像这样交互式地升级/降级包：

yarn upgrade my_package@^

这将生成包可用版本的交互式列表，供您选择。这样：

Couldn't find any versions for "my_package" that matches "^"
? Please choose a version of "my_package" from this list: (Use arrow keys)
❯ 0.10.1
  0.10.0
  0.9.3
  0.9.2
  0.9.1
  0.9.0
  0.8.2
  0.8.0