Update docs

Build/MQTTnet.nuspec

@@ -12,6 +12,8 @@
     <description>MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker).</description>
     <releaseNotes>* [Core] Fixed some still thread blocking parts in the code (thanks to @kpreisser).
 * [Core] Updated 3rd-Party packages.
+* [Core] Fixed an issue when reading the body of a package from a disconnected sender (thanks to @kpreisser).
+* [Core] Fixed wrong parsing of the body length (thanks to @kpreisser).
 * [Client] The client interfaces are now implementing _IDisposable_.
 * [Client] The disconnected event now contains the exception which was thrown and causing the disconnect.
 * [Server] Fixed an issue which lets the server block 1 second after accepting a new connection (thanks to @kpreisser).

Frameworks/MQTTnet.NetStandard/Serializer/MqttPacketReader.cs

@@ -114,6 +114,7 @@ namespace MQTTnet.Serializer
                 {
                     throw new MqttProtocolViolationException($"Remaining length is invalid (Data={string.Join(",", readBytes)}).");
                 }
+
                 multiplier *= 128;
             } while ((encodedByte & 128) != 0);