library.json is a manifest file of a library package. It allows developers
to keep a project in its own structure and define:
compatible frameworks and platforms
external dependencies
advanced build settings.
Information in library.json should be represented in JSON-style
via associative array
(name/value pairs). The order doesn’t matter. The allowable fields
(names from pairs) are described below.
You can validate library.json manifest file using the pio pkg pack command.