v0.3.0

wgpu-nufft 0.3.0

GPU plans in up to eight dimensions, and one deterministic spreader for
every type-1 plan, faster in every rank and for sparse and clustered
points; see CHANGELOG.md.

Highlights:

• Type 1, 2 and 3 GPU plans in six to eight dimensions, in all three
  precisions; the 4D and 5D paths are rewritten.
• Every type-1 plan spreads through one rank-generic block spreader with
  bitwise-repeatable sums. It bins points by the first cell of their kernel
  support, chooses its bins per execution from the point density, and
  splits crowded blocks across many workgroups.
• Large bins sort several times faster, and F64 kernel weights evaluate
  faster.
• F64 and Df64 type-2 plans in one to three dimensions interpolate binned
  points.
• F32 plans reject tolerances their rounding would miss
  (NufftError::F32ToleranceUnreachable).
• A standalone browser build, wgpu_web.js, is attached to this release.

Fixed:

• The rank-generic spreader compiles with FXC on DX12.

Known limitations:

• On DX12 with FXC, Df64 plans take minutes to create, mostly in the Df64
  FFT shaders; on Windows, prefer Vulkan for Df64 plans.
• 7D and 8D plans are practical only on small grids at tolerances near
  1e-3; see "Higher dimensions" in the README.
• Metal has not been tested.