v5.0.0

! Read the migration guide (https://github.com/dotnet/MQTTnet/wiki/Upgrading-guide) before migrating to version 5!

Changes

Memory usage optimizations (thanks to @mregen)
Performance optimizations (thanks to @mregen)
Removal of no longer supported .NET Frameworks (BREAKING CHANGE)
Changed code signing and nuget certificate
Namespace changes (BREAKING CHANGE)
Removal of Managed Client (BREAKING CHANGE)
Client: MQTT 5.0.0 is now the default version when connecting with a server (BREAKING CHANGE)
Client: Fixed enhanced authentication.
Client: Exposed WebSocket compression options in MQTT client options (thanks to @victornor, #2127)
Server: Set default for "MaxPendingMessagesPerClient" to 1000 (BREAKING CHANGE)
Server: Set SSL version to "None" which will let the OS choose the version (BREAKING CHANGE)
Server: Fixed enhanced authentication.
Server: Set default for "MaxPendingMessagesPerClient" to 1000 (BREAKING CHANGE)
Server: Set SSL version to "None" which will let the OS choose the version (BREAKING CHANGE)
Server: Added API for getting a single session (thanks to @AntonSmolkov, #2131)
Server: Fixed "TryPrivate" (Mosquitto feature) handling (thanks to @victornor, #2125) (BREAKING CHANGE)