issue while trying to install

[goatgate]

| #[cfg(feature = "commercial")]
| ^^^^^^^^^^^^^^^^^^^^^^
|
= note: expected values for feature are: default
= help: consider adding commercial as a feature in Cargo.toml
= note: see https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html for more information about checking conditional configuration
warning: unexpected cfg condition value: commercial
--> src/lib.rs:99:15