release 2.0-rc1

Author: u-less

src/Directory.Build.props

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <TargetFrameworks>netcoreapp2.2;netcoreapp3.0</TargetFrameworks>
     <LangVersion>latest</LangVersion>
-    <Version>2.0-preview7</Version>
+    <Version>2.0-rc1</Version>
     <PackageProjectUrl>https://github.com/RayTale/Ray</PackageProjectUrl>
     <RepositoryUrl>https://github.com/RayTale/Ray.git</RepositoryUrl>
     <LICENSE>https://github.com/RayTale/Ray/blob/master/LICENSE</LICENSE>
@@ -11,6 +11,8 @@
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-19351-01" PrivateAssets="All"/>