Use import syntax for ethjs-util internally

Author: cgewecke

src/account.ts

@@ -1,4 +1,4 @@
-const ethjsUtil = require('ethjs-util')
+import * as ethjsUtil from 'ethjs-util'
 import * as assert from 'assert'
 import * as secp256k1 from 'secp256k1'
 import * as BN from 'bn.js'

src/bytes.ts

@@ -1,4 +1,4 @@
-const ethjsUtil = require('ethjs-util')
+import * as ethjsUtil from 'ethjs-util'
 import * as BN from 'bn.js'
 import { assertIsBuffer, assertIsArray, assertIsHexString } from './helpers'
 

src/hash.ts

@@ -1,6 +1,6 @@
 const createKeccakHash = require('keccak')
 const createHash = require('create-hash')
-const ethjsUtil = require('ethjs-util')
+import * as ethjsUtil from 'ethjs-util'
 import * as rlp from 'rlp'
 import { toBuffer, setLengthLeft } from './bytes'
 

src/helpers.ts

@@ -1,4 +1,4 @@
-const ethjsUtil = require('ethjs-util')
+import * as ethjsUtil from 'ethjs-util'
 
 /**
  * Throws if a string is not hex prefixed

src/object.ts

@@ -1,4 +1,4 @@
-const ethjsUtil = require('ethjs-util')
+import * as ethjsUtil from 'ethjs-util'
 import * as assert from 'assert'
 import * as rlp from 'rlp'
 import { toBuffer, baToJSON, unpadBuffer } from './bytes'