Conflux-Chain/conflux-rust v1.0.1 on GitHub

Light nodes

Fix the following RPCs on light nodes: cfx_epochNumber, cfx_getNextNonce, cfx_GetBlockByHash, cfx_getBlockByEpochNumber, cfx_getBlockByHashWithPivotAssumption, cfx_getBlocksByEpoch.
Make cfx_getTransactionReceipt return null instead of timeout on light nodes to increase compatibility with js-conflux-sdk.
Fix bug where light nodes disconnect peers if the user queries the genesis block.
Add periodic heartbeat messages to the light protocol.