failed to select a version for the requirement `rustc_version = "^0.1.7"`

[Willendless]

Hi, I tried cargo check in my codebase using core_io but I encountered this issue recently. Since rustc_version(<2.0) have been yanked, can you upgrade it?

error: failed to select a version for the requirement `rustc_version = "^0.1.7"`
  candidate versions found which didn't match: 0.3.3, 0.3.2, 0.3.1, ...
  location searched: crates.io index
required by package `core_io v0.1.20190701`
    ... which is depended on by `shim v0.1.0 (/home/eos/rustos/lib/shim)`
    ... which is depended on by `pi v0.1.0 (/home/eos/rustos/lib/pi)`

[dobromyslov]

Looks like this project is stalled:(