Bumped ethereumjs-util version to v7.0.1 in package.json

Author: holgerd77

package.json

@@ -46,7 +46,7 @@
     "@web3-js/scrypt-shim": "^0.1.0",
     "aes-js": "^3.1.1",
     "bs58check": "^2.1.2",
-    "ethereumjs-util": "^6.0.0",
+    "ethereumjs-util": "^7.0.1",
     "hdkey": "^1.1.1",
     "randombytes": "^2.0.6",
     "utf8": "^3.0.0",