message: refactor(core): use bip32 in abstractEthLikeCoin
diff: import { CoinFamily, BaseCoin as StaticsBaseCoin } from '@bitgo/statics';
  import { getBuilder, Eth } from '@bitgo/account-lib';
  import * as Bluebird from 'bluebird';
  -import * as bitgoUtxoLib from '@bitgo/utxo-lib';
  +import * as bip32 from 'bip32';
  import { randomBytes } from 'crypto';
  import {
  @@ -121,10 +121,7 @@ export abstract class AbstractEthLikeCoin extends BaseCoin {
  }
  generateKeyPair(seed?: Buffer): KeyPair {
  - if (!seed) {
  - seed = randomBytes(512 / 8);
  - }
  - const extendedKey = bitgoUtxoLib.HDNode.fromSeedBuffer(seed);
  + const extendedKey = bip32.fromSeed(seed || randomBytes(32));
  const xpub = extendedKey.neutered().toBase58();
  return {
  