Error after upgrading ndarray from 0.16.1 to 0.17.1

[alphaville]

I upgraded ndarray from version 0.16.1 to 0.17.1, which was released recently, and I'm getting the following error when I try to apply mod_cholesky_se99 on an instance of ndarray:

error[E0599]: no method named `mod_cholesky_se99` found for struct `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>, f64>` in the current scope
  --> src/constraints/affine_space.rs:54:31
   |
54 |         let res = a_times_a_t.mod_cholesky_se99();
   |                               ^^^^^^^^^^^^^^^^^ method not found in `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>, f64>`

For more information about this error, try `rustc --explain E0599`.
error: could not compile `optimization_engine` (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...
error: could not compile `optimization_engine` (lib test) due to 1 previous error

Everything works fine with ndarray version 0.16.1 (see #34).