feat: add filterMap to namespace

Author: kgryte

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

@@ -180,6 +180,15 @@ setReadOnly( ns, 'FancyArray', require( '@stdlib/ndarray/fancy' ) );
 */
 setReadOnly( ns, 'filter', require( '@stdlib/ndarray/filter' ) );
 
+/**
+* @name filterMap
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/ndarray/filter-map}
+*/
+setReadOnly( ns, 'filterMap', require( '@stdlib/ndarray/filter-map' ) );
+
 /**
 * @name flag
 * @memberof ns