Embed pdb's instead of having them separate in package.

[AraHaan]

I would like the pdb's on here to be embedded instead due to the fact that .NET Core does support embedded pdbs it seems.

Also it would help users with debugging as well as then the pdbs are included inside of the dll's and not separate (and also would not be missing), plus with sourcelink would make it 👌.

Also embedding pdb's unconditionally also is a benefit because then this can be nuked from your csproj as well:

<AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>

[atifaziz]

Closed via 8ed3e27 that was merge of PR #79.