5.0.0

• Modernised solution to use single multi-target project, in built package creation etc.
• Dropped unsupported/dead platforms
• Added support for newer platforms
• Modernised internal code with newer syntax
• Add nullability annotations/support
• Updated/reduced dependencies
• Added activity tracing, can be connected to logging systems/open API/application insights etc.
• Fixed some possible hangs/race conditions on socket handling
• Added support for cancellation tokens on the locator SearchAsync methods
• Added AggregateSsdpDeviceLocator simplifying searching across multiple network adapters
• Changed to use github actions for builds/tests/publishing
• Update sample and package test projects
• Minor updates to readme etc.
• Improved XML reading for device description documents, making it more secure and tolerant of bad characters, and added support for custom xml reader settings.
• Note: there are some breaking changes at the code level which may or may not affect client application code depending on your usage.
• Changed to use github actions for CI/release instead of appveyor
• Updates to readme and FAQ