Cargo Features

turbo-json-checker has no features set by default.

[dependencies]
turbo-json-checker = { version = "2.0.1", features = ["nightly"] }
nightly = packed_simd

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

packed_simd nightly?