Added the underscore node_module.

node_modules/underscore/cjs/_shallowProperty.js

@@ -0,0 +1,8 @@
+// Internal helper to generate a function to obtain property `key` from `obj`.
+function shallowProperty(key) {
+  return function(obj) {
+    return obj == null ? void 0 : obj[key];
+  };
+}
+
+module.exports = shallowProperty;