connector-xdai: web3.eth.estimateGas, works considering called solidity method do not throw an exception. So, for method having modifier with access control on msg.sender calling estimateGas without from field throws error.to make it work ,transactionConfig.from = web3SigningCredential.ethAccount before calling estimateGas (63f5ff6)
deps: elliptic upgrade to >6.5.3 for CVE-2020-28498 (d75b9af)
example: fix README and add script to cleanup app data after test (b07bde4)