Cargo Features

media-types has no features set by default.

[dependencies]
media-types = { version = "0.2.0", features = ["dev"] }
dev = clippy

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.

clippy dev?

Enables clippy ^0.0.33