Cargo Features

minreq-async has no features set by default.

[dependencies]
minreq-async = { version = "2.13.1", features = ["proxy", "https"] }
proxy = base64
https

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.

base64 proxy?