Update node.js dependencies to the latest versions

- This fixes the problem with keccak module failing to build its native bindings and falling back to pure JS implementation

Author: cameel

package.json

@@ -7,9 +7,9 @@
     "semver": "^5.3.0"
   },
   "devDependencies": {
-    "ethereumjs-util": "^5.0.1",
-    "standard": "^8.4.0",
-    "swarmhash": "^0.1.0"
+    "ethereumjs-util": "^7.0.2",
+    "standard": "^8.6.0",
+    "swarmhash": "^0.1.1"
   },
   "scripts": {
     "lint": "standard update",

update

@@ -43,7 +43,7 @@ dirs.forEach(function (dir) {
       .map(function (pars) {
         const fileContent = readFile(pars.path)
         pars.longVersion = buildVersion(pars)
-        pars.keccak256 = '0x' + ethUtil.sha3(fileContent).toString('hex')
+        pars.keccak256 = '0x' + ethUtil.keccak(fileContent).toString('hex')
         pars.urls = [ 'bzzr://' + swarmhash(fileContent).toString('hex') ]
         return pars
       })