Wasserstein

- Removed support for Python 3.6.
- Python 3.10 wheels uploaded to PyPI.
- Apple silicon arm64 wheels uploaded to PyPI.
- Enable OpenMP functionality to be toggled on/off, prior to using any Wasserstein functionality, via a lazy import mechanism.
- Fixed events being modified in place by `preprocess_CenterWeightedCentroid`.
- Fixed bug in `emd()` method of `PairwiseEMD` when `request_mode` is enabled.

1.0.x

- Small tweaks to C++ API for EventGeometry package.
- Removing default constructors for `CorrelationDimension` and `Histogram1DUtils` from Python.

- Many small tweaks to public API; see documentation.
- C++ examples updated.
- Float32 functionality now available and tested in Python.

0.3.x

- Changed symmetric EMD storage from lower triangular to upper triangular to match SciPy's `squareform` function.

- Fixed bug with masking out particles farther than R from the origin.

- Wheels are now built against older NumPy versions to facilitate compatibility.

- Migrated continuous integration testing and building to travis-ci.com.
- Changed location of `nbins` argument to `CorrelationDimension` to better match boost histogram usage.
- Building wheels for more architectures now.
- Using SWIG 4.0.2.