drop unnecessary features from "chrono" dependency
I see that a new dependency on "chrono" was added in one of the recent commits: 502f7884
You might want to use default-features = false
and only enable additional features if they are necessary (which will probably be none, judging after taking a quick look at the code additions in this commit).
The "oldtime" default feature pulls in the outdated time v0.1 crate, and the "clock" default feature seems to be unnecessary because you're not fetching the current time from the system.