The NuGet package for Mac is difficult to maintain for us, so we have given up releasing it.

What's Changed

• Fix incorrect [Flags] attributes by @shimat in https://github.com/shimat/opencvsharp/pull/1429
• Docker: dotnet5-opencv453 -> dotnet6-opencv460 by @shimat in https://github.com/shimat/opencvsharp/pull/1431
• Fix access violation BackgroundSubtractorKNN by @timstokman in https://github.com/shimat/opencvsharp/pull/1434
• Added nuget build for runtime-ubuntu-20.04-x64 in https://github.com/shimat/opencvsharp/pull/1451
• Encoded white grey value into maskonly flag by @jacob-m-nash in https://github.com/shimat/opencvsharp/pull/1456
• file-scoped namespaces by @shimat in https://github.com/shimat/opencvsharp/pull/1471
• Restore LineSegmentDetector by @kjagosz in https://github.com/shimat/opencvsharp/pull/1479
• Update CMakeLists.txt by @lwqwag in https://github.com/shimat/opencvsharp/pull/1478
• setup-dotnet@v2 by @shimat in https://github.com/shimat/opencvsharp/pull/1480
• Fix null pointer error by @apull-zy in https://github.com/shimat/opencvsharp/pull/1500
• Add MatMemoryManager and Mat.AsSpan by @shimat in https://github.com/shimat/opencvsharp/pull/1513