0.2
  - Windows / MacOS: upgrade binary packages to OpenCV 4.4.0
  - Add ocv_rectangle
  - Add ocv_polygon
  - Add ocv_bbox
  - Add ocv_chull
  - Add ocv_keypoints for keypoint detection using FAST, Harris
  - Add ocv_grayscale
  - Add ocv_version

0.1
  - Initial CRAN release
