Added the underscore node_module.

node_modules/underscore/modules/first.js

@@ -0,0 +1,9 @@
+import initial from './initial.js';
+
+// Get the first element of an array. Passing **n** will return the first N
+// values in the array. The **guard** check allows it to work with `_.map`.
+export default function first(array, n, guard) {
+  if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
+  if (n == null || guard) return array[0];
+  return initial(array, array.length - n);
+}