Hide developmentonly package ref

Author: AArnott

src/NerdBank.GitVersioning/NerdBank.GitVersioning.csproj

@@ -8,7 +8,7 @@
     <DocumentationRootFolder>..\..\doc</DocumentationRootFolder>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="DotNetMDDocs" Version="0.111.0" />
+    <PackageReference Include="DotNetMDDocs" Version="0.111.0" PrivateAssets="all" />
     <PackageReference Include="LibGit2Sharp" Version="0.24.7-g9fca61fdda" PrivateAssets="None" />
     <PackageReference Include="Newtonsoft.Json" Version="10.0.2" />
     <PackageReference Include="System.Diagnostics.Process" Version="4.3.0" Condition=" '$(TargetFramework)' == 'netstandard1.3' " />