Revert "remove node_modules"

This reverts commit 2fb5731f23.

node_modules/normalize-package-data/lib/safe_format.js

@@ -0,0 +1,9 @@
+var util = require('util')
+
+module.exports = function() {
+  var args = Array.prototype.slice.call(arguments, 0)
+  args.forEach(function(arg) {
+    if (!arg) throw new TypeError('Bad arguments.')
+  })
+  return util.format.apply(null, arguments)
+}