Add explixit open-cv dep (#1575)

Author: KSGulin

setup.py

@@ -69,7 +69,10 @@
     "torchvision>=0.3.0,<0.15",
     "torchaudio<=0.13",
 ]
-_pytorch_vision_deps = _pytorch_deps + ["torchvision>=0.3.0,<0.15"]
+_pytorch_vision_deps = _pytorch_deps + [
+    "torchvision>=0.3.0,<0.15",
+    "opencv-python<=4.6.0.66",
+]
 _transformers_deps = _pytorch_deps + [
     f"{'nm-transformers' if is_release else 'nm-transformers-nightly'}"
     f"~={version_nm_deps}",