What is new?
* added libjpeg-turbo versions 1.2.0 - 2.0.0
* ops module with DCT, blockification, etc.
* introduced numba as a dependency
Improvements
* DCT is now numba-accelerated and can work on jpeglib outputs
Bugfixes
* inference of grayscale colorspace, when only luminance is passed to `from_dct`
* fixed blorch's test dependency installation