RUSTSEC-2021-0113 AtomicBucket<T> unconditionally implements Send/Sync

In the affected versions of the crate, AtomicBucket unconditionally implements Send/Sync traits. Therefore, users can create a data race to the inner T: !Sync by using the AtomicBucket::datawith API. Such data races can potentially cause memory corruption or other undefined behavior. The flaw was...