cargo-edit 0.4.0

This extends Cargo to allow you to add and remove dependencies by modifying your `Cargo.toml` file from the command line. It contains `cargo add`, `cargo rm`, and `cargo upgrade`.
Documentation 
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{
  "git": {
    "sha1": "8f8028e90fb535f09d07751570cb607cd040a257"
  }
}