chore: release v0.19.1

[YeungOnion]

🤖 New release

• statrs: 0.19.0 -> 0.19.1 (✓ API compatible changes)

Changelog

0.19.1 - 2026-07-31

Added

• let callers choose the binomial sampling algorithm

Fixed

• order the selection fast paths by total_cmp, not <=
• replace hand-rolled quickselect with select_nth_unstable_by
• address review on the BINV/BTPE sampler

Other

• add a selection benchmark, and ordered fast paths it exposed
• build the NaN order-statistic test under no_std
• move binomial sampling into its own module
• split the sampler's branch selection out of the RNG path
• require std for the BTPE chi-square test
• sample Binomial via BINV/BTPE instead of n Bernoulli trials
• Bound the Newton iteration count and cover the quantile guards
• Add safeguarded-Newton inverse_cdf for Chi and InverseGamma

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This PR was generated with release-plz.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.86%. Comparing base (02fdab6) to head (46302d4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #425   +/-   ##
=======================================
  Coverage   94.86%   94.86%           
=======================================
  Files          62       62           
  Lines       13974    13974           
=======================================
  Hits        13256    13256           
  Misses        718      718           

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