Move internal modules to “internal” folder.

.internal/basePick.js

@@ -0,0 +1,17 @@
+import basePickBy from './.internal/basePickBy.js';
+import hasIn from './hasIn.js';
+
+/**
+ * The base implementation of `pick` without support for individual
+ * property identifiers.
+ *
+ * @private
+ * @param {Object} object The source object.
+ * @param {string[]} paths The property paths to pick.
+ * @returns {Object} Returns the new object.
+ */
+function basePick(object, paths) {
+  return basePickBy(object, paths, (value, path) => hasIn(object, path));
+}
+
+export default basePick;