try_v2 0.9.0

Provides a derive macro & helper traits for `Try`
Documentation 
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use ninja_build_rs::{
    Result,
    nightly::{Nightly, cargo_allowed_features},
};

fn main() -> Result<()> {
    let ac = autocfg::new();

    let allowed_features = cargo_allowed_features()?;
    ac.emit_unstable_feature("never_type", &allowed_features);
    ac.emit_unstable_feature("try_trait_v2", &allowed_features);
    ac.emit_unstable_feature("try_trait_v2_residual", &allowed_features);
    Ok(())
}