Bump opencv-python from 3.3.0.10 to 4.2.0.32

Bumps [opencv-python](https://github.com/skvark/opencv-python) from 3.3.0.10 to 4.2.0.32.
- [Release notes](https://github.com/skvark/opencv-python/releases)
- [Commits](https://github.com/skvark/opencv-python/commits)

---
updated-dependencies:
- dependency-name: opencv-python
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
 numpy==1.15.1
 matplotlib==2.0.2
-opencv-python==3.3.0.10
+opencv-python==4.2.0.32
 tensorflow-gpu==1.15.2