Blazor support

[srid]

When using this library on a Blazor client-side app running on WebAssembly, it throws:

At least the http-client part of the library should be able to work on the browser?

[dbrattli]

I see we use Stopwatch to measure the fetch time for each request and we want to measure that without measuring the rest of the pipeline as well. Will need to look more deeper into this to see if it's possible to e.g refactor it out as a separate assembly.