v6.3.2 (update)
remove inner class RLPOutputStream.Baos;
make RLPOutputStream final;
remove redundant "integer data cannot exceed 32 bytes" exception in SuperSerial;
SHA-256 (headlong-6.3.2.jar): 2b0baa86cf9f0cf7a530f4f1e8032f2afadf35503cb4299b89167d9ab59f193a