add some packages

node_modules/array-unique/index.js

@@ -0,0 +1,28 @@
+/*!
+ * array-unique <https://github.com/jonschlinkert/array-unique>
+ *
+ * Copyright (c) 2014-2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+module.exports = function unique(arr) {
+  if (!Array.isArray(arr)) {
+    throw new TypeError('array-unique expects an array.');
+  }
+
+  var len = arr.length;
+  var i = -1;
+
+  while (i++ < len) {
+    var j = i + 1;
+
+    for (; j < arr.length; ++j) {
+      if (arr[i] === arr[j]) {
+        arr.splice(j--, 1);
+      }
+    }
+  }
+  return arr;
+};