Features from optional dependencies

peginator implicit feature

Enables peginator ^0.6.0

parser

pratt implicit feature

Enables pratt

pratt:

A Pratt parser for Rust

num implicit feature
dashu implicit feature

Enables dashu ^0.3.1

dashu:

A library set of big numbers

toml implicit feature

Enables toml ^0.7.2

json5 implicit feature

Enables json5

json5:

A Rust JSON5 serializer and deserializer which speaks Serde