Add node modules and new code for release (#168)

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

node_modules/underscore/cjs/findIndex.js

@@ -0,0 +1,6 @@
+var _createPredicateIndexFinder = require('./_createPredicateIndexFinder.js');
+
+// Returns the first index on an array-like that passes a truth test.
+var findIndex = _createPredicateIndexFinder(1);
+
+module.exports = findIndex;