Added ED2K hash and BitTorrent-v2 pieces hash (#375)

Author: zhangzih4n

table.csv

@@ -546,6 +546,7 @@ ssz,                            serialization,  0xb501,         draft,      Simp
 ssz-sha2-256-bmt,               multihash,      0xb502,         draft,      SSZ Merkle tree root using SHA2-256 as the hashing function and SSZ serialization for the block binary
 sha2-256-chunked,               multihash,      0xb510,         draft,      Hash of concatenated SHA2-256 digests of 8*2^n MiB source chunks; n = ceil(log2(source_size/(10^4 * 8MiB)))
 json-jcs,                       ipld,           0xb601,         draft,      The result of canonicalizing an input according to JCS - JSON Canonicalisation Scheme (RFC 8785)
+bittorrent-pieces-root,         multihash,      0xb702,         draft,      BitTorrent v2 pieces root hash.
 iscc,                           softhash,       0xcc01,         draft,      ISCC (International Standard Content Code) - similarity preserving hash
 zeroxcert-imprint-256,          zeroxcert,      0xce11,         draft,      0xcert Asset Imprint (root hash)
 nonstandard-sig,                varsig,         0xd000,         deprecated, Namespace for all not yet standard signature algorithms
@@ -556,6 +557,7 @@ bls12_381-g2-sig,               varsig,         0xd0eb,         draft,      G2 s
 eddsa,                          varsig,         0xd0ed,         draft,      Edwards-Curve Digital Signature Algorithm
 eip-191,                        varsig,         0xd191,         draft,      EIP-191 Ethereum Signed Data Standard
 jwk_jcs-pub,                    key,            0xeb51,         draft,      JSON object containing only the required members of a JWK (RFC 7518 and RFC 7517) representing the public key. Serialisation based on JCS (RFC 8785)
+ed2k,                           multihash,      0xed20,         draft,      eDonkey2000 hash.
 fil-commitment-unsealed,        filecoin,       0xf101,         permanent,  Filecoin piece or sector data commitment merkle node/root (CommP & CommD)
 fil-commitment-sealed,          filecoin,       0xf102,         permanent,  Filecoin sector data commitment merkle node/root - sealed and replicated (CommR)
 shelter-contract-manifest,      shelter,        0x511e00,       draft,      Shelter protocol contract manifest