…t dynamically, fetch function pointers, and call Marshal.GetDelegateForFunction. this should provide lots more flexibility and allow this library and its build system to collapse down to something small and simple. relevant to #248 and #253. still a work in progress, but this approach does currently pass all the unit tests on Windows.
…der.dynamic. for now, it goes resolver.misc. there will be multiple platform-specific versions of this. the one for dotnetcore 3.0 will just use System.Runtime.InteropServices.NativeLibrary. other platforms and runtimes will implement something similar. #248