Minor changes

A.Rotate and A.ShiftScaleRotate now support new rotation method for bounding boxes, ellipse. (#1203 by @victor1cea)
A.Rotate now supports new argument crop_border. If set to True, the rotated image will be cropped as much as possible to eliminate pixel values at the edges that were not well defined after rotation. (#1214 by @bonlime)
Tests that use multiprocessing now run much faster (#1218 by @Dipet)
Improved type hints (#1219 by @Dipet )
Fixed a deprecation warning in match_histograms. (#1121 by @BloodAxe)

Bugfixes

A.CropNonEmptyMaskIfExists modified the first element of masks in-place. Now, this behavior is fixed and A.CropNonEmptyMaskIfExists doesn't do in-place modification of input masks. (#1193 by @ORippler).
Albumentations now correctly serialized and desirealized fill_value and mask_fill_value parameters for A.GridDropout. (#1191 by @victor1cea)
A.ColorJitter now correctly works with A.ReplayCompose. (#1199 by @zakajd)
Fixed incorrect behavior of A.ColorJitter for np.float32 input images when contrast is set to 0 (previously, all values were set to 0.5 instead of using the average value).. (#1207 by @Dipet)
A.Rotate, A.Affine and A.ShiftScaleRotate now do rotation in the same way. Fixed incorrect rotation angle for A.Affine. A.Rotate and A.ShiftScaleRotate now correctly rotate the keypoints 90 degrees and don't leave black lines around the edges of the image. (#1091 by @Dipet )