Update ndarray requirement from 0.13.0 to 0.15.1

[dependabot-preview[bot]]

Updates the requirements on ndarray to permit the latest version.

Changelog

Sourced from ndarray's changelog.

Version 0.15.1 (2021-03-29)

Enhancements

• Arrays and views now have additional PartialEq impls so that it's possible to compare arrays with references to arrays and vice versa by [@bluss]

  rust-ndarray/ndarray#958

Bug fixes

• Fix panic in creation of .windows() producer from negative stride array by [@bluss]

  rust-ndarray/ndarray#957

Other changes

• Update BLAS documentation further by @bluss

  rust-ndarray/ndarray#955 rust-ndarray/ndarray#959

Version 0.15.0 (2021-03-25)

New features

• Support inserting new axes while slicing by [@jturner314]. This is an example:

  let view = arr.slice(s![.., -1, 2..;-1, NewAxis]);
  

  rust-ndarray/ndarray#570

• Support two-sided broadcasting in arithmetic operations with arrays by [@SparrowLii]

  This now allows, for example, addition of a 3 x 1 with a 1 x 3 array; the operands are in this case broadcast to 3 x 3 which is the shape of the result.

  Note that this means that a new trait bound is required in some places when mixing dimensionality types of arrays in arithmetic operations.

... (truncated)

Commits

• 37e4313 0.15.1
• a141bc4 DOC: Add .std()/.var() feature to release note
• 8bce8cc Merge pull request #959 from rust-ndarray/blas-test
• 86accd6 MAINT: Update blas test for blas-src 0.8
• 5b8f6de DOC: Fix .len() -> len in another AxisDescription example
• e5d4bf7 Merge pull request #958 from rust-ndarray/partial-eq-with-reference
• 3d7df5c TEST: Stop using ndarray-rand F32 in tests
• abb0f9e ndarray-rand 0.14
• b1b5a0e FEAT: Implement PartialEq for array == &array and &array == array
• a77825a Merge pull request #957 from rust-ndarray/neg-stride-windows
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #58.