Add node modules and new code for release (#57)

Co-authored-by: taakleton <taakleton@users.noreply.github.com>

node_modules/underscore/modules/shuffle.js

@@ -0,0 +1,6 @@
+import sample from './sample.js';
+
+// Shuffle a collection.
+export default function shuffle(obj) {
+  return sample(obj, Infinity);
+}