chore(package): update dependencies

https://greenkeeper.io/

package.json

@@ -13,25 +13,25 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "async": "^1.5.2",
-    "clone": "^1.0.2",
+    "async": "^2.1.2",
+    "clone": "^2.0.0",
     "ethereumjs-account": "^2.0.2",
     "ethereumjs-block": "^1.2.2",
     "ethereumjs-tx": "^1.1.0",
-    "ethereumjs-util": "^4.4.0",
-    "ethereumjs-vm": "^1.4.0",
+    "ethereumjs-util": "^5.0.1",
+    "ethereumjs-vm": "^2.0.2",
     "fake-merkle-patricia-tree": "^1.0.1",
     "isomorphic-fetch": "^2.2.0",
     "request": "^2.67.0",
     "semaphore": "^1.0.3",
     "solc": "^0.4.2",
     "tape": "^4.4.0",
-    "web3": "^0.15.1",
+    "web3": "^0.16.0",
     "xhr": "^2.2.0",
     "xtend": "^4.0.1"
   },
   "devDependencies": {
-    "browserify": "^12.0.1"
+    "browserify": "^13.1.1"
   },
   "browser": {
     "request": false