RPC Updates

[darwintree]

EIP-1898 Epoch params(low priority)

TODOs

• cfx_newFilter
• cfx_newBlockFilter
• cfx_newPendingTransactionFilter
• cfx_getFilterChanges
• cfx_getFilterLogs
• cfx_uninstallFilter

local RPC only(low priority)

• debug_getTransactionsByEpoch

• debug_getTransactionsByBlock

• trace_epoch

• pos_getLedgerInfoByBlockNumber

• pos_getLedgerInfoByEpochAndRound

• debug_getEpochReceiptProofByTransaction

• cfx_getEpochReceipts (new optional include_eth_receipts param)

• cfx_getCollateralInfo

• cfx_getSponsorInfo (new fields usedStoragePoints and availableStoragePoints)

missed rpc

• cfx_getAdmin