Numbagg

0.4.1 fixes an issue with `move_exp_nanstd` not accepting an `axis` kwarg.

- `move_exp_nanstd`
- `move_exp_nanvar`
- `move_exp_nancorr`
- `move_exp_nancov`

Because functions can now take more than one array, the signature of the moving exponential functions has changed slightly to require `alpha` to be a keyword argument. This is technically a breaking change, though most consumers will be passing `alpha` as a kwarg already (xarray included).

This release adds a `min_weight` parameter to the exponential moving functions, so that it's possible to output values if there's a sufficient number of recent valid values — similar to the `min_count` count parameter to the simple moving functions.