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

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

node_modules/underscore/cjs/chain.js

@@ -0,0 +1,10 @@
+var underscore = require('./underscore.js');
+
+// Start chaining a wrapped Underscore object.
+function chain(obj) {
+  var instance = underscore(obj);
+  instance._chain = true;
+  return instance;
+}
+
+module.exports = chain;