add missing import from transaction package

Author: MicaiahReid

src/chains/ethereum/transaction/package.json

@@ -49,6 +49,7 @@
   ],
   "dependencies": {
     "@ethereumjs/common": "3.0.1",
+    "@ethereumjs/util": "8.0.2",
     "@ganache/ethereum-address": "0.5.2",
     "@ganache/ethereum-utils": "0.5.2",
     "@ganache/rlp": "0.5.2",