Cargo Features

Astrolabe has no features set by default.

[dependencies]
astrolabe = { version = "0.5.3", features = ["sqlx-postgres", "serde"] }
sqlx-postgres = sqlx

Enables postgres of sqlx

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.

serde implicit feature

Enables serde

serde:

A generic serialization/deserialization framework

sqlx sqlx-postgres?