add tagging as a put_object opt in the typespec

Author: ethangunderson

lib/ex_aws/s3.ex

@@ -954,6 +954,7 @@ defmodule ExAws.S3 do
           | {:meta, amz_meta_opts}
           | {:if_match, binary}
           | {:if_none_match, binary}
+          | {:tagging, binary}
           | acl_opt
           | storage_class_opt
         ]