Bump MQTTnet from 3.0.8 to 3.0.15

[dependabot-preview]

Bumps MQTTnet from 3.0.8 to 3.0.15.

Release notes

Sourced from MQTTnet's releases.

v3.0.15

• [Core] Fixed some issues in nuget packages.
• [Client] Changed exception types so that proper exceptions are thrown when connecting (#1082).
• [Client] Exposed Dup flag in application messages.
• [Client] Improved keep alive message sending.
• [RpcClient] Fixed an issue when using a custom application message reveived handler (#1093).
• [RpcClient] Fixed a race condition when using timeout and cancellation token at the same time (BREAKING CHANGE!).
• [Server] Improved keep alive message sending.

v3.0.14

• [Core] Added .NET 5.0 TFMs (thanks to @StefanOssendorf, @JanEggers).
• [Core] Added support for TLS 1.3 (requires .NET Core 3.1+) (thanks to @Dvergatal).
• [Core] Added support for MaximumQoS transmit when using MQTTv5 (thanks to @nayato).
• [Core] Aligned the format of some log messages.
• [Client] Fixed an issue with connection state detection (thanks to @tobiasfrick).
• [Client] Fixed an issue when receiving partial QoS 2 packets after a reconnect.
• [Client] Added new API for raw packet inspection.
• [ManagedClient] Removed AutoReconnect since this does no longer work (BREAKING CHANGE!).
• [RpcClient] Moved the RPC topic validation to the topic generation strategy.
• [RcpClient] Added interface for MqttRpcClient.
• [Server] Reduced async tasks count by moving dedicated keep alive tasks per connection to shared one.
• [Server] Session takeover and keep alive timeout are now properly set in DISCONNECT packet.
• [Server] Fixed bug in PubRel packet generation (MQTTv5 only).
• [Server] Improved message processing performance (+ ~5%).
• [Server] Fix wrong usage of client session items for undelivered messages.
• [Server] Allow to respond with a reason code in PUBACK/PUBREC (thanks to @muneebmajeed).
• [Server] Fixed topic filter comparer on edge cases, e.g. "foo/" matching "foo/#" (thanks to @dagophil).
• [Core] Added code documentation.

v3.0.13

• [Client] Fixed wrong value for "ClientWasConnected" in "MqttClientDisconnectedEventArgs" #976 (thanks to @dbeinder).
• [Client] Added direct support for Amazon AWS connections (requires .NET Core 3.1) (thanks to @henning-krause).
• [Client] handle disconnect package and propagate disconnect reason code (thanks to @JanEggers)
• [ManagedClient] Exposed the internal MQTT client.
• [Server] Added client message queue interceptor for QoS level (thanks to @msallin).
• [Server] improved behavior when multiple connections fight over a session (thanks to @JanEggers)
• [Server] Exposed ClientDisconnectedInterceptor (thanks to @SeppPenner).

v3.0.12

• [LowLevelClient] Fixed a null reference exception when connecting to a not existing server (thanks to @SGStino).
• [RcpClient] Adjusted some namespaces (BREAKING CHANGE!).
• [AspNetCore] Adjusted some namespaces (BREAKING CHANGE!).
• [Server] Adjusted some namespaces (BREAKING CHANGE!).
• [Server] Added state checks (throw if not started etc.) for most server APIs.
• [Server] Exposed real X509Certificate2 (instead byte array) to TLS options (thanks to @borigas).
• [Server] Fixed memory leak with TCP sockets (MqttServer is now Disposable!) (BREAKING CHANGE!).
• [Core] Fixed a null reference exception in the MqttTcpChannel with WriteAsync and ReadAsync.
• [Core] Added server interceptor for undelivered messages (thanks to @cshark-inator).
• [nuget] Added support for SourceLink (thanks to @JTOne123).

... (truncated)

Commits

• 12f3461 Improve RPC client handling.
• 0582734 Update codeql-analysis.yml
• 1e88d6a Merge remote-tracking branch 'origin/master'
• 8261ba9 Update docs.
• b766c1b Refactor keep alive message handling in order to fix issues with sudden disco...
• 6c18889 Create codeql-analysis.yml
• 2d4ea8e Improve nuget packages.
• 15d3761 Merge pull request #1097 from yyjdelete/nuspec
• ed52045 Use the data converter only when creating packets.
• cfc4ebe Expose Dup flag in application messages (#1096).
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #158.