tests: use privateKey 0x000...0001 for examples
tests: use privateKey 0x000...0001 for examples

visvirial/bitcoinjs-lib,junderw/bitcoinjs-lib,BitGo/bitcoinjs-lib,bitcoinjs/bitcoinjs-lib,visvirial/bitcoinjs-lib,junderw/bitcoinjs-lib,bitcoinjs/bitcoinjs-lib,BitGo/bitcoinjs-lib