windows build

[casperdcl]

CI fails due to conda-forge/howardhinnant_date-feedstock#23 (spotted in #209)

[KrisThielemans]

@naegelejd do you have this problem with yardl? (you have windows builds, so I'm assuming you're testing them). We don't include date ourselves.

[naegelejd]

I haven't seen this yet because we don't use conda anywhere in yardl, and we don't publish Windows packages for mrd (https://anaconda.org/channels/ismrmrd/packages/mrd/overview).

Yardl itself and the C++ code it generates are tested on Windows, but we obtain dependencies and configure the toolchain using vcpkg.