- Add a ThrowHelper utility class that provides non-returning methods
  for throwing exceptions, this in turn helps to reduce the code size,
  there-by increasing the chances of inlining simple (getter/setter)
  methods, which has cascading CQ improvments in its own.
  (See: dotnet/coreclr#6103)
- Convert checks in the form of `(x < 0 || x > max)` to `(uint) x > max`
  to further reduce code-size and increase inlining chances
- Update MSTest package deps
- Drop netfx.props (which I introduces in a previous PR to support
  building on linux) and replace with the now standard/canonical way of
  referencing NetFX BCL on all platforms with a <PackageReference>
- closes aeron-io#588