Change packing to be runned by AppVeyor.

Directory.Build.props

@@ -28,6 +28,7 @@
     <NoWarn>$(NoWarn);NU1701</NoWarn>
   </PropertyGroup>
   <PropertyGroup Label="Nuget">
+    <IsPackable>false</IsPackable>
     <Authors>ppy Pty Ltd</Authors>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageProjectUrl>https://github.com/ppy/osu</PackageProjectUrl>
@@ -36,6 +37,5 @@
     <Company>ppy Pty Ltd</Company>
     <Copyright>Copyright (c) 2019 ppy Pty Ltd</Copyright>
     <PackageTags>osu game</PackageTags>
-    <PackageOutputPath>$(MSBuildThisFileDirectory)artifacts\nupkg\</PackageOutputPath>
   </PropertyGroup>
 </Project>

appveyor.yml

@@ -14,12 +14,11 @@ build:
   project: osu.sln
   parallel: true
   verbosity: minimal
+  publish_nuget: true
 after_build:
   - ps: dotnet tool restore
   - ps: dotnet format --dry-run --check
   - ps: .\InspectCode.ps1
-artifacts:
-  - path: 'artifacts\nupkg\*.nupkg'
 test:
   assemblies:
     except:

appveyor_deploy.yml

@@ -15,8 +15,7 @@ build:
   project: build\Desktop.proj # Skipping Xamarin Release that's slow and covered by fastlane
   parallel: true
   verbosity: minimal
-artifacts:
-  - path: 'artifacts\nupkg\*.nupkg'
+  publish_nuget: true
 deploy:
   - provider: Environment
     name: nuget

osu.Game/osu.Game.csproj

@@ -9,7 +9,7 @@
     <PackageId>ppy.osu.Game</PackageId>
     <Version>0.0.0</Version>
     <PackageIcon>icon.png</PackageIcon>
-    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <IsPackable>true</IsPackable>
   </PropertyGroup>
   <ItemGroup Label="Icon">
     <None Include="..\assets\lazer-nuget.png">