Update API docs, and suppress generation by default

Author: AArnott

src/Cake.GitVersioning/Cake.GitVersioning.csproj

@@ -35,7 +35,7 @@
 
   <ItemGroup>
     <PackageReference Include="Cake.Core" Version="0.26.0" />
-    <PackageReference Include="DotNetMDDocs" Version="0.111.0" />
+    <PackageReference Include="DotNetMDDocs" Version="0.111.0" Condition=" '$(GenerateMarkdownApiDocs)' == 'true' " />
     <PackageReference Include="Nerdbank.GitVersioning.LKG" Version="1.6.20-beta-gfea83a8c9e" />
   </ItemGroup>
 

src/NerdBank.GitVersioning/NerdBank.GitVersioning.csproj

@@ -7,7 +7,7 @@
     <PackageId>Nerdbank.GitVersioning.Core</PackageId>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="DotNetMDDocs" Version="0.111.0" PrivateAssets="all" />
+    <PackageReference Include="DotNetMDDocs" Version="0.111.0" PrivateAssets="all" Condition=" '$(GenerateMarkdownApiDocs)' == 'true' " />
     <PackageReference Include="LibGit2Sharp" Version="0.24.7-g9fca61fdda" PrivateAssets="None" />
     <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
     <PackageReference Include="System.Diagnostics.Process" Version="4.3.0" Condition=" '$(TargetFramework)' == 'netstandard1.3' " />