feat: add nditerMatrices to namespace

Author: kgryte

lib/node_modules/@stdlib/ndarray/iter/lib/index.js

@@ -63,6 +63,15 @@ setReadOnly( ns, 'nditerEntries', require( '@stdlib/ndarray/iter/entries' ) );
 */
 setReadOnly( ns, 'nditerIndices', require( '@stdlib/ndarray/iter/indices' ) );
 
+/**
+* @name nditerMatrices
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/ndarray/iter/matrices}
+*/
+setReadOnly( ns, 'nditerMatrices', require( '@stdlib/ndarray/iter/matrices' ) );
+
 /**
 * @name nditerRows
 * @memberof ns