`linalg` and `stats` are incompatible with ndarray 0.16.0

[ivan-aksamentov]

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Just linking the issues from the other repos for visibility:

• https://github.com/rust-ndarray/ndarray-linalg/issues/380
• https://github.com/rust-ndarray/ndarray-stats/issues/97

This could be due to version mismatch in the dependencies.

Numerous third-party dependencies are also broken.

Things like .inv() (from linalg) and .argmax() from stats are essential for many applications. So, without these packages working it is not possible to take advantage of the improvements of ndarray 0.16, no matter how good they are.

I believe that before releasing new versons of ndarray maintainers should take care that at least the packages in the same organization work correctly.

I'd also consider to move the packages into a single workspace. This way it's easier to spot problems and to maintain them.