feat: add flatten5dBy to namespace

Author: kgryte

lib/node_modules/@stdlib/array/base/lib/index.js

@@ -225,6 +225,15 @@ setReadOnly( ns, 'flatten4dBy', require( '@stdlib/array/base/flatten4d-by' ) );
 */
 setReadOnly( ns, 'flatten5d', require( '@stdlib/array/base/flatten5d' ) );
 
+/**
+* @name flatten5dBy
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/array/base/flatten5d-by}
+*/
+setReadOnly( ns, 'flatten5dBy', require( '@stdlib/array/base/flatten5d-by' ) );
+
 /**
 * @name getter
 * @memberof ns