Optimize release-mode builds for better binary size (#3)

Empirically, this shrinks the final binary size from 2.2M to 1.3M
(tested on Ubuntu 24.04 with Rust 1.83), while only costing a few extra
seconds of build time

Resolves #2

Cargo.toml

@@ -21,3 +21,8 @@ unsafe-code = "forbid"
 [lints.clippy]
 cargo = "warn"
 pedantic = "warn"
+
+[profile.release]
+codegen-units = 1
+lto = true
+strip = true