Fix versions in build script.

Build/build.ps1

@@ -46,7 +46,7 @@ Write-Host
 ####################################################################
 
 # Build MQTTnet.Server Portable
-&dotnet publish ..\Source\MQTTnet.Server\MQTTnet.Server.csproj --configuration Release
+&dotnet publish ..\Source\MQTTnet.Server\MQTTnet.Server.csproj --configuration Release /p:FileVersion=$assemblyVersion /p:Version=$nugetVersion
 
 $source = "..\Source\MQTTnet.Server\bin\Release\netcoreapp2.2\publish"
 $destination = "..\Source\MQTTnet.Server\bin\MQTTnet.Server-Portable-v$nugetVersion.zip"
@@ -57,7 +57,7 @@ If(Test-path $destination) {Remove-item $destination}
 ####################################################################
 
 # Build MQTTnet.Server Linux-x64
-&dotnet publish ..\Source\MQTTnet.Server\MQTTnet.Server.csproj --configuration Release --self-contained --runtime linux-x64
+&dotnet publish ..\Source\MQTTnet.Server\MQTTnet.Server.csproj --configuration Release /p:FileVersion=$assemblyVersion /p:Version=$nugetVersion --self-contained --runtime linux-x64 
 
 $source = "..\Source\MQTTnet.Server\bin\Release\netcoreapp2.2\linux-x64\publish"
 $destination = "..\Source\MQTTnet.Server\bin\MQTTnet.Server-Linux-x64-v$nugetVersion.zip"
@@ -68,7 +68,7 @@ If(Test-path $destination) {Remove-item $destination}
 ####################################################################
 
 # Build MQTTnet.Server Windows-x64
-&dotnet publish ..\Source\MQTTnet.Server\MQTTnet.Server.csproj --configuration Release --self-contained --runtime win-x64
+&dotnet publish ..\Source\MQTTnet.Server\MQTTnet.Server.csproj --configuration Release /p:FileVersion=$assemblyVersion /p:Version=$nugetVersion --self-contained --runtime win-x64
 
 $source = "..\Source\MQTTnet.Server\bin\Release\netcoreapp2.2\win-x64\publish"
 $destination = "..\Source\MQTTnet.Server\bin\MQTTnet.Server-Windows-x64-v$nugetVersion.zip"