add snupkg format

Author: jbtule

.appveyor.yml

@@ -9,6 +9,6 @@ build_script:
 test: off
 
 artifacts:
-  - path: '**\bin\*\*.nupkg'
+  - path: '**\bin\*\*.[s]*nupkg'
 
 skip_branch_with_pr: true

ManyConsole.CommandLineUtils/ManyConsole.CommandLineUtils.csproj

@@ -14,6 +14,7 @@
     <IncludeSource>True</IncludeSource>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <Version>1.1.2-alpha</Version>
   </PropertyGroup>