Bump opencv-python-headless from 4.1.2.30 to 4.2.0.32

Bumps [opencv-python-headless](https://github.com/skvark/opencv-python) from 4.1.2.30 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-headless
  dependency-type: direct:production
...

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Author: dependabot[bot]

requirements.txt

@@ -28,7 +28,7 @@ networkx==2.3
 nltk==3.4.5
 numpy==1.17.0
 opencv-python==4.1.0.25
-opencv-python-headless==4.1.2.30
+opencv-python-headless==4.2.0.32
 opt-einsum==3.1.0
 pandas==0.25.1
 Pillow==6.1.0