core2 is unmaintained, all versions yanked

The maintainer decided stop maintaining crate and yanked all published versions. Potential alternatives: - embedded-io solves the same general problem - no-std-io2 is a maintained fork...

PT-2019-20181

Name of the Vulnerable Software and Affected Versions spin crate affected versions not specified Description The author of the spin crate no longer maintains it. As a result, users are advised to consider alternative crates that support no std, such as conquer-once, lock api, spinning top, or...