Cargo Features

oembed-rs has no features set by default.

[dependencies]
oembed-rs = { version = "0.0.8", features = ["jsonschema"] }
jsonschema = schemars

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.

schemars jsonschema?