chore: upgrade vm-browserify to 1.0.1

vm-browserify up until 1.0.1 dependy upon unlicensed code. [0][1] This means
node-libs-browser does too. This resolves the issue by upgrading it. All
changes in between where non-breaking. [2]

[0] browserify/browserify#1828
[1] component/indexof#6
[2] https://github.com/browserify/vm-browserify/releases

Author: fahrradflucht

package.json

@@ -30,7 +30,7 @@
     "tty-browserify": "0.0.0",
     "url": "^0.11.0",
     "util": "^0.10.3",
-    "vm-browserify": "0.0.4"
+    "vm-browserify": "1.0.1"
   },
   "homepage": "http://github.com/webpack/node-libs-browser",
   "main": "index.js",