Update ndarray requirement from 0.15 to 0.17

Updates the requirements on [ndarray](https://github.com/rust-ndarray/ndarray) to permit the latest version.
- [Release notes](https://github.com/rust-ndarray/ndarray/releases)
- [Changelog](https://github.com/rust-ndarray/ndarray/blob/master/RELEASES.md)
- [Commits](https://github.com/rust-ndarray/ndarray/compare/ndarray-rand-0.15.0...0.17.2)

---
updated-dependencies:
- dependency-name: ndarray
  dependency-version: 0.17.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -22,7 +22,7 @@ exclude = [
 [dependencies]
 approx = "0.5.1"
 cfg-if = "1.0.0"
-ndarray = { version = "0.15", optional = true }
+ndarray = { version = "0.17", optional = true }
 num-traits = "0.2.12"
 num = "0.4"
 rand = { version = "0.8.5", default-features = false, features = ["small_rng"] }