Similar to fs::file_touch this does not create the file if
it does not exist. Use s3_file_create to do this if needed.
s3_file_touch(path, ...)(character): A character vector of paths or s3 uri
parameters to be passed to s3_copy_object
character vector of s3 uri paths
This method will only update the modification time of the AWS S3 object.
if (FALSE) {
# Require AWS S3 credentials
dir = s3_file_temp(tmp_dir = "MyBucket")
path = s3_path(dir, letters[1:2], ext = "txt")
s3_file_touch(path)
}