Index: frontend/node_modules/es-array-method-boxes-properly/index.js
===================================================================
--- frontend/node_modules/es-array-method-boxes-properly/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/es-array-method-boxes-properly/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,30 @@
+module.exports = function properlyBoxed(method) {
+	// Check node 0.6.21 bug where third parameter is not boxed
+	var properlyBoxesNonStrict = true;
+	var properlyBoxesStrict = true;
+	var threwException = false;
+	if (typeof method === 'function') {
+		try {
+			// eslint-disable-next-line max-params
+			method.call('f', function (_, __, O) {
+				if (typeof O !== 'object') {
+					properlyBoxesNonStrict = false;
+				}
+			});
+
+			method.call(
+				[null],
+				function () {
+					'use strict';
+
+					properlyBoxesStrict = typeof this === 'string'; // eslint-disable-line no-invalid-this
+				},
+				'x'
+			);
+		} catch (e) {
+			threwException = true;
+		}
+		return !threwException && properlyBoxesNonStrict && properlyBoxesStrict;
+	}
+	return false;
+};