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

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

node_modules/underscore/modules/contains.js

@@ -0,0 +1,10 @@
+import isArrayLike from './_isArrayLike.js';
+import values from './values.js';
+import indexOf from './indexOf.js';
+
+// Determine if the array or object contains a given item (using `===`).
+export default function contains(obj, item, fromIndex, guard) {
+  if (!isArrayLike(obj)) obj = values(obj);
+  if (typeof fromIndex != 'number' || guard) fromIndex = 0;
+  return indexOf(obj, item, fromIndex) >= 0;
+}