Uvw

Added

- Added support for rational Bézier cells (PR 8)

Added

- `DataArray` now lazy-copies the underlying data at write-time. Changes to the
data after instantiation will now be reflected in the written file.

Added

- Can now pass a communicator object to parallel writers (4)

Added

- CI now with Github Actions

Fixed

- Wrong number of nodes for hexahedron cell (8 instead of 9)

Added

- Drop-in replacement for `pyevtk.hl` that is less restrictive and more
feature-rich than the original (e.g. arbitrary number of components in data
and data compression).

Fixed

- Bug that prevented using variable size cells in `UnstructuredGrid`

Deprecated

- Support for Python 3.6 removed, this is the last compatible version

Added

- Support for `os.PathLike` for filenames
- Support for `PImageData`

Changed

- Using relative path for Source in `PRRectilinearGrid`
- Tests use temporary directories and files
- Array data is converted to `ndarray` if necessary with `numpy.asarray`
- Version numbers are managed with `vX.Y.Z` tags using
[Versioneer](https://github.com/python-versioneer/python-versioneer) and
follow PEP440