update some packages and remove node_modules from repo

app/node_modules/buffer-alloc/index.js

@@ -1,32 +0,0 @@
-var bufferFill = require('buffer-fill')
-var allocUnsafe = require('buffer-alloc-unsafe')
-
-module.exports = function alloc (size, fill, encoding) {
-  if (typeof size !== 'number') {
-    throw new TypeError('"size" argument must be a number')
-  }
-
-  if (size < 0) {
-    throw new RangeError('"size" argument must not be negative')
-  }
-
-  if (Buffer.alloc) {
-    return Buffer.alloc(size, fill, encoding)
-  }
-
-  var buffer = allocUnsafe(size)
-
-  if (size === 0) {
-    return buffer
-  }
-
-  if (fill === undefined) {
-    return bufferFill(buffer, 0)
-  }
-
-  if (typeof encoding !== 'string') {
-    encoding = undefined
-  }
-
-  return bufferFill(buffer, fill, encoding)
-}