Features from optional dependencies

pubgrub implicit feature

Enables pubgrub

pubgrub:

PubGrub version solving algorithm

pyo3 implicit feature

Enables pyo3

pyo3:

Bindings to Python interpreter

Affects pep440_rs::python_module, version::PyVersion

rkyv implicit feature

Enables rkyv

rkyv:

Zero-copy deserialization framework for Rust

serde implicit feature

Enables serde

serde:

A generic serialization/deserialization framework

tracing implicit feature

Enables tracing

tracing:

Application-level tracing for Rust