Log Message:
py-wand: updated to 0.6.6

Version 0.6.6
-------------
- Added :meth:`Image.get_image_distortion() \ 
<wand.image.BaseImage.get_image_distortion>` method.
- Fixed `QuantumType` allocation for 32-bit architectures using HDRI.
- Fixed `MagickSizeType` allocation for \ 
:meth:`ResourceLimits.set_resource_limit() \ 
<wand.resource.ResourceLimits.set_resource_limit>` and segfault with \ 
``armv7l`` architecture.
- Fixed :class:`~wand.color.Color` deallocation error on 32-bit architectures.
- Deprecated :meth:`wand.color.scale_quantum_to_int8()`
- [TEST] Deprecated PDF format from test assets.
- [TEST] Deprecated :class:`~wand.drawing.Drawing` test `fx_wand` fixture to \ 
improve parallel CI testing.
- [TEST] Marked all ImageMagick-7 features skipped when running test suite with \ 
ImageMagick-6.