Seems like it is fixed/removed: https://github.com/antvis/.github/commit/cb641113703e531ee43...

Some are still on npm but marked "deprecated":

https://www.npmjs.com/package/size-sensor/v/1.0.4?activeTab=...

As the article states, you can see in the package.json that the optionalDependencies references "@antv/setup": "github:antvis/G2#7cb42f57561c321ecb09b4552802ae0ac55b3a7a"

I'm pretty sure those commits have been removed from github:

https://github.com/antvis/G2/issues/7401#issuecomment-448480...

https://github.com/antvis/G2/issues/7394