Pymde

Make installation on Apple Silicon easier.

Build arm64 wheels, and better build isolation.

Fix related to SVD computation, used when the standardization constraint is used.

Adds a function `pymde.seed()` for controlling randomness.

PyMDE's internal random state can be set by passing an integer seed
to this function (e.g., `pymde.seed(0)`). This is useful when
exact reproducibility is required.

See https://pymde.org/getting_started/index.html#reproducibility

* addresses some deprecation warnings raised when using torch 1.9.0
* includes some plotting fixes