Upgrade OpenCV Version

[leeping-ng]

It looks like it's time to upgrade our OpenCV dependency from opencv-python==4.1.2.30, for the following reasons:

• Allow PeekingDuck to run on M1 Mac
• Address behavioural differences with newer opencv versions, such as cv2.resizeWindow() and input arg types for coordinates when using draw functions

We should upgrade to version 4.5 and newer, as there are some issues with the prior versions as documented below. As of now, the latest opencv-python==4.5.4.60 still works with Python 3.6, which is the lowest version of Python supported by PeekingDuck.

Version	Comments
4.1.2.30	Recommended openCV version for PeekingDuck as of 15 Dec 2021. Doesn't work for M1 Mac.
From 4.2.0.32 to 4.4.0.46	Not recommended to use these versions due to a few reported issues mainly due to QT issues with MacOS, such as imshow() not showing, or segmentation fault, or QT error in MacOS
4.5.1.48	Works with M1 Mac and the issues from earlier versions have been fixed by dropping QT support for Mac. Different behaviour for cv2.resize() and cv2.resize_window() when compared to 4.1.2.30.
4.5.2.52	Coordinates need to be int instead of float for drawing
4.5.2.54	Bugfix for 4.5.2.52

Definition of done:

• Update requirements.txt and setup.cfg with the new version
• Update draw nodes to take in int coordinates.

[ongtw]

One correction: the int instead of float coordinates changes began with version 4.5.1.
The key difference between 4.5.1 and 4.5.2 is that the former auto typecast numpy.float32 (but not python float) into int while the latter does not. This is why PeekingDuck "works" with 4.5.1, but on 4.5.2 it shows the error for drawing coordinates to be int instead of float.