Automatically add -v, -V, and --version to your binaries

This crate contains an attribute macro, auto_version, which when applied to your main function, will generate the output for binary -v or binary --version: shell $ ./binary -v $ 0.1.0 $ ./binary --version $ 0.1.0

### Example ```rust use autoversion::autoversion;

#[auto_version] fn main() { // executed code } ```

⚠️ Only works with cargo ⚠️

In the case where the code is not compiled with cargo, the version will be replaced with the message "`auto_version` macro only works for projects compiled with cargo".