fix: add InstanceSchema to transformAsync

[Yovach]

I can't do

transformAsync(instance(File), async (input) => {
  return file.length;
});

but

transform(instance(File), async (input) => {
  return file.length;
});

is working

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[fabian-hiller]

Thank you! I will try to release a new version with the fix in the next days.

[fabian-hiller]

v0.14.0 is now available.