Since Rust crates are not installed or discouraged to be installed

as system dependencies because of the maintenance burden of being the

next crates.io, we will have to download the following crates as vendored

dependencies. Hence, do not be scared if the dependencies are done like

this.

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To check new crates or update the versions, just go to the subprojects

folder and run `grep -r crates .` then set versions appropriately.

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