Bump to v4.10.0.

_castPath.js

@@ -0,0 +1,15 @@
+define(['./isArray', './_stringToPath'], function(isArray, stringToPath) {
+
+  /**
+   * Casts `value` to a path array if it's not one.
+   *
+   * @private
+   * @param {*} value The value to inspect.
+   * @returns {Array} Returns the cast property path array.
+   */
+  function castPath(value) {
+    return isArray(value) ? value : stringToPath(value);
+  }
+
+  return castPath;
+});