Bump opencv-python from 3.4.5.20 to 4.5.1.48

Bumps [opencv-python](https://github.com/skvark/opencv-python) from 3.4.5.20 to 4.5.1.48.
- [Release notes](https://github.com/skvark/opencv-python/releases)
- [Commits](https://github.com/skvark/opencv-python/commits)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -5,7 +5,7 @@ pigpio==1.78
 pyserial==3.5
 nidaqmx==0.5.7
 click==7.1.2
-opencv-python==3.4.5.20
+opencv-python==4.5.1.48
 opencv-contrib-python==4.4.0.46
 numpy>=1.14.5
 pandas==1.1.4