Pass **kwargs into pipe_file()

[hungcs]

Is there a reason why pipe_file() silently drops **kwargs here? https://github.com/fsspec/filesystem_spec/blob/master/fsspec/spec.py#L679

could this be changed to

def pipe_file(self, path, value, **kwargs):
    """Set the bytes of given file"""
    with self.open(path, "wb", **kwargs) as f:
        f.write(value)

Happy to open a pr for this!
I'm trying to pass in content_type="image/svg+xml" here and it's being silently ignored.

fsspec/adlfs#294