Symbol package is not being published to nuget.org.

[teo-tsirpanis]

While there is code that enables producing a .snupkg file for Microsoft.Build.Locator, the symbol package does not get uploaded to nuget.org:

MSBuildLocator/Directory.Build.props

Lines 23 to 25 in c16c535

	<!-- Build symbol package (.snupkg) to distribute the PDB containing Source Link -->
	<IncludeSymbols>true</IncludeSymbols>
	<SymbolPackageFormat>snupkg</SymbolPackageFormat>