`text-span` is a library for spans across text. It allows users to track areas of text.
Each of the `span-value-*` features corresponds to a possible size for the `SpanValue` type, which determines the maximum size of a span. The larger the `SpanValue` type, the larger the span can be.
The `ariadne` feature allows interoperabillity with the [`ariadne`](https://crates.io/crates/ariadne) crate.