Bump to v4.0.0.

internal/baseToPath.js

@@ -0,0 +1,16 @@
+define(['../isArray', './stringToPath'], function(isArray, stringToPath) {
+
+  /**
+   * The base implementation of `_.toPath` which only converts `value` to a
+   * path if it's not one.
+   *
+   * @private
+   * @param {*} value The value to process.
+   * @returns {Array} Returns the property path array.
+   */
+  function baseToPath(value) {
+    return isArray(value) ? value : stringToPath(value);
+  }
+
+  return baseToPath;
+});