sync: move CancellationToken to tokio-util #2721
Merged
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The
CancellationToken
utility is only available with thetokio_unstable
flag. This was done as the API is not final, but itadds friction for users.
This patch moves
CancellationToken
to tokio-util where it is generallyavailable. The tokio-util crate does not have any constraints on
breaking change releases.