[menpo] Conda packaging warnings

We're getting this with the menpo package. @amohammadi - please advise.

Adding .* to spec 'pathlib 1.0' to ensure satisfiability.  Please consider putting {{ var_name }}.* or some relational operator (>/</>=/<=) on this spec in meta.yaml, or if req is also a build req, using {{ pin_compatible() }} jinja2 function instead.  See https://conda.io/docs/user-guide/tasks/build-packages/variants.html#pinning-at-the-variant-level
WARNING:conda_build.utils:Adding .* to spec 'pathlib 1.0' to ensure satisfiability.  Please consider putting {{ var_name }}.* or some relational operator (>/</>=/<=) on this spec in meta.yaml, or if req is also a build req, using {{ pin_compatible() }} jinja2 function instead.  See https://conda.io/docs/user-guide/tasks/build-packages/variants.html#pinning-at-the-variant-level