Mark McCaskey d1cadf98e1 Add new features to WasiState builder API
Allows for ergonomic swapping out of stdin, stdout, stderr as well as
a new PreopenDir sub-builder which enables for user control over the
permissions that the directory is preopened with.

This PR includes breaking changes to the pubilc API.
2020-01-21 16:23:30 -08:00
..
2020-01-16 14:07:18 -08:00