feat: add filled4dBy to namespace

Author: kgryte

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

@@ -207,6 +207,15 @@ setReadOnly( ns, 'filled3dBy', require( '@stdlib/array/base/filled3d-by' ) );
 */
 setReadOnly( ns, 'filled4d', require( '@stdlib/array/base/filled4d' ) );
 
+/**
+* @name filled4dBy
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/array/base/filled4d-by}
+*/
+setReadOnly( ns, 'filled4dBy', require( '@stdlib/array/base/filled4d-by' ) );
+
 /**
 * @name filled5d
 * @memberof ns