Don't get process even with feature

[BastienVigneron]

Hello,

Thank you for this useful plugin, unfortunately I didn't succeed to get process information even with actix-web-prometheus = {version = "0.1.2", features = ["process"]} in my cargo.toml.

Is there any additional operation to do ?

[MathieuNls]

Same issue over here:

error[E0554]: `#![feature]` may not be used on the stable release channel
  --> /.../.cargo/registry/src/github.com-1ecc6299db9ec823/rustix-0.36.5/src/lib.rs:99:26
   |
99 | #![cfg_attr(rustc_attrs, feature(rustc_attrs))]
   |                          ^^^^^^^^^^^^^^^^^^^^

For more information about this error, try `rustc --explain E0554`.
error: could not compile `rustix` due to previous error

cargo clean && cargo build fixed it for me @BastienVigneron .