Bump MQTTnet from 3.0.15 to 3.0.16

Created by: dependabot[bot]

Bumps MQTTnet from 3.0.15 to 3.0.16.

Release notes

Sourced from MQTTnet's releases.

v3.0.16

• [Core] Fixed DISCONNECT packet reading for protocol version 3.1.0.DisconnectPacket
• [Client] Added support for deferred message approval (#1075, thanks to @​tkurucsai).
• [Client] Exposed missing APIs for .NET 5.0 build (thanks to @​yyjdelete).
• [Client] Improved disconnect handling (#1134, thanks to @​yyjdelete).
• [Client] Fix TLS parameter options builder (#1104).
• [Server] Add new overload for options builder.
• [Server] Exposed endpoint in MqttServerClientDisconnectedEventArgs.
• [Server] Remove client disconnected handler from wrong implementation location (BREAKING CHANGE).

Commits

• ed5e6ee Update project files.
• 2e019f3 Update docs.
• cc9bc2d Merge remote-tracking branch 'origin/master'
• 306bce5 Refactor code.
• 6fe7ce7 FIxed MqttNetLogLevel.Verbose incorrectly mapped to LogLevel.Debug (#1170)
• 8f1d4e3 Remove client disconnected handler from wrong implementation location.
• 7733852 Refactor code.
• 962622a Merge pull request #1134 from yyjdelete/issue996
• 899ed7b Rename MqttClient.ConnectState to MqttClientConnectionStatus
• 10f7d80 Merge pull request #1132 from qzwzqty/master
• Additional commits viewable in compare view

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