chore: release v0.20.0

[YeungOnion]

🤖 New release

• statrs: 0.19.1 -> 0.20.0 (⚠ API breaking changes)

⚠ statrs breaking changes

--- failure feature_no_longer_enables_feature: package feature no longer enables another feature ---

Description:
A feature no longer enables another feature in this package's Cargo.toml. This will break downstream crates which rely on the implied feature being enabled.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#cargo-feature-remove-another
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.48.0/src/lints/feature_no_longer_enables_feature.ron

Failed in:
  feature nalgebra no longer enables std

Changelog

0.20.0 - 2026-08-18

Added

• Support alloc-backed APIs in no_std (#403)

Fixed

• compute FisherSnedecor pdf in log space for large freedoms
• Unblock release-plz
• make Geometric cdf(1)/inverse_cdf(p) exact and portable
• correct Geometric::inverse_cdf against its definition
• compute Hypergeometric pmf in log space for large populations

Other

• Source large-freedom pdf fixtures from mpmath instead of SciPy
• (deps) bump actions/checkout from 4 to 7
• drop overexplanation implementation

---

This PR was generated with release-plz.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.07%. Comparing base (10cf6d6) to head (1a58781).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #439   +/-   ##
=======================================
  Coverage   95.07%   95.07%           
=======================================
  Files          62       62           
  Lines       14203    14203           
=======================================
  Hits        13504    13504           
  Misses        699      699           

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