Can not install for Python 3.7 due to opencv-python version mismatch

[RunOrVeith]

Description

Using python3.7, pip install pyannote-video does not work because of the hard version requirement opencv-python==3.4.1.15. As can be seen on the PyPy Page, version 3.4.1.15 can not be used with python 3.7.

Steps/Code to Reproduce

pip3.7 install pyannote-video

Expected Results

Pip installs pyannote-video

Actual Results

Collecting opencv-python==3.4.1.15 (from pyannote-video)
  Could not find a version that satisfies the requirement opencv-python==3.4.1.15 (from pyannote-video) (from versions: 3.4.2.17, 3.4.3.18, 3.4.4.19)
No matching distribution found for opencv-python==3.4.1.15 (from pyannote-video)

Fix

require opencv-python>=3.4.1.15 in setup.py. The current release version is 3.4.4.19.
As 3.4.4.19 also works for all the same python versions as 3.4.1.15 plus 3.7, the hard requirement version could probably also be increased. (This is untested, but I imagine there are no breaking changes between 3.4.1.15 and 3.4.4.19.)

[hbredin]

Thanks for reporting this.

I'd gladly merge a pull request including this change as long as you also provide a script that I can run to test if it does not break anything.

[RunOrVeith]

Unfortunately, I can not provide you with a full test suite that covers the whole repo (or did you mean something else?).
However, you can see here the file diffs between tag 3.4.4.15 and 3.4.4.19. It adds only installation changes, and updates the opencv submodule to version 3.4.4 (see commit messages here). You can read the ChangeLog for OpenCV here. It specifies a maintenance release, and some changes to the DNN module.
I highly doubt that OpenCV would introduce breaking changes going from version 3.4.1 to 3.4.4.