v13.0.0

Some small breaking changes:

• The interval attribute of RationalQuadraticSpline is now a two-tuple with type tuple[float | int, float | int], representing the upper and lower bound of the spline. Previously, the interval was a float | int, forcing the interval to be symmetric about 0.
• Any custom loss functions used with fit_to_data now should accept a key (whether or not it is used), having signature loss(params, static, x, condition, key), for consistency of API.

What's Changed

• Allow uneven interval in spline by @danielward27 in #166
• Sample contrastive by @danielward27 in #167

Full Changelog: v12.4.0...v13.0.0