install from nuget cannot get libwebp loaded under .net core 2.2

Have spent some hours to see the 'unable to load libwebp.dll or one of its dependencies' when using libwebp-net from NuGet.

However the project works like a champ when I add the repo as submodule and simply add Imazen.WebP as project reference.

Start by reproducing the NuGet installation under .NET Core 2.2 and compare it with the working project-reference setup described in the issue. Trace how the package supplies libwebp.dll and its dependencies; done means a consumer can install from NuGet and load libwebp successfully.

Written by the indexing model from the issue text.