Support for Interpolation Expression Sequences

[arredondos]

It looks like interpolated strings, or Interpolation Expression Sequences (IES) as they are called in the spec, are not supported.

Example:

[WebFreak001]

rest is part of Pure-D/serve-d (might be in nightly soon, open an issue there if you want to track it)

depends on dlang-community/libdparse#510