update README

Signed-off-by: Jun Kimura <[email protected]>

README.md

@@ -44,12 +44,12 @@ This repository contains multiple modules:
 
 - [ibc-solidity v0.3.38](https://github.com/hyperledger-labs/yui-ibc-solidity/releases/tag/v0.3.38)
 - [lcp v0.2.11](https://github.com/datachainlab/lcp/releases/tag/v0.2.11)
-- [ethereum-elc v0.0.18](https://github.com/datachainlab/ethereum-elc/releases/tag/v0.0.18)
+- [ethereum-elc v0.0.20](https://github.com/datachainlab/ethereum-elc/releases/tag/v0.0.20)
 - [lcp-go v0.2.10](https://github.com/datachainlab/lcp-go/releases/tag/v0.2.10)
 - [lcp-solidity v0.1.15](https://github.com/datachainlab/lcp-solidity/releases/tag/v0.1.15)
 - [yui-relayer v0.5.8](https://github.com/hyperledger-labs/yui-relayer/releases/tag/v0.5.8)
 - [ethereum-ibc-relay-chain v0.3.10](https://github.com/datachainlab/ethereum-ibc-relay-chain/releases/tag/v0.3.10)
-- [ethereum-ibc-relay-prover v0.3.2](https://github.com/datachainlab/ethereum-ibc-relay-prover/releases/tag/v0.3.2)
+- [ethereum-ibc-relay-prover v0.3.4](https://github.com/datachainlab/ethereum-ibc-relay-prover/releases/tag/v0.3.4)
 
 ## Build enclave and run E2E test