Add BenchmarkDotNet.Templates in build-and-pack.cmd

Author: AndreyAkinshin

build/build-and-pack.cmd

@@ -12,4 +12,5 @@ dotnet pack .\src\BenchmarkDotNet.Tool\BenchmarkDotNet.Tool.csproj -c Release --
 dotnet pack .\src\BenchmarkDotNet.Annotations\BenchmarkDotNet.Annotations.csproj -c Release --include-symbols -p:SymbolPackageFormat=snupkg
 rmdir artifacts /s /q
 mkdir artifacts
-for /R %%x in (BenchmarkDotNet*.*nupkg) do copy "%%x" "artifacts/" /Y
+for /R %%x in (BenchmarkDotNet*.*nupkg) do copy "%%x" "artifacts/" /Y
+nuget pack .\templates\BenchmarkDotNet.Templates.nuspec -OutputDirectory artifacts