rand_distr-0.5.0-alpha.0

This is a pre-release. To depend on this version, use rand_distr = "=0.5.0-alpha.0" to prevent automatic updates (which can be expected to include breaking changes).

Additions

• Make distributions comparable with PartialEq (#1218)
• Add WeightedIndexTree (#1372)

Changes

• Target rand version 0.9.0-alpha.0
• Remove unused fields from Gamma, NormalInverseGaussian and Zipf distributions (#1184)
  This breaks serialization compatibility with older versions.
• Dirichlet now uses const generics, which means that its size is required at compile time (#1292)
• The Dirichlet::new_with_size constructor was removed (#1292)

Fixes

• Fix Knuth's method so Poisson doesn't return -1.0 for small lambda (#1284)
• Fix Poisson distribution instantiation so it return an error if lambda is infinite (#1291)
• Fix Dirichlet sample for small alpha values to avoid NaN samples (#1209)
• Fix infinite loop in Binomial distribution (#1325)