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diff --git a/node_modules/grunt-legacy-log-utils/node_modules/lodash/_isIndex.js b/node_modules/grunt-legacy-log-utils/node_modules/lodash/_isIndex.js
new file mode 100644
index 000000000..c7ff6079a
--- /dev/null
+++ b/node_modules/grunt-legacy-log-utils/node_modules/lodash/_isIndex.js
@@ -0,0 +1,21 @@
+/** Used as references for various `Number` constants. */
+var MAX_SAFE_INTEGER = 9007199254740991;
+
+/** Used to detect unsigned integer values. */
+var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+/**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+function isIndex(value, length) {
+  value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
+  length = length == null ? MAX_SAFE_INTEGER : length;
+  return value > -1 && value % 1 == 0 && value < length;
+}
+
+module.exports = isIndex;