Update opencv-python requirement (#230)

Updates the requirements on [opencv-python](https://github.com/opencv/opencv-python) to permit the latest version.
- [Release notes](https://github.com/opencv/opencv-python/releases)
- [Commits](https://github.com/opencv/opencv-python/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -13,7 +13,7 @@
     long_description=open("README.md").read(),
     install_requires=[
         "setuptools>=51.0,<69.1",
-        "opencv-python>=4.5.1.48,<4.8.2.0",
+        "opencv-python>=4.5.1.48,<4.9.1.0",
         "numpy>=1.19.5,<1.27.0",
         "tqdm>=4.59,<4.67",
         "scikit-image>=0.17.2,<0.23.0",