feat: add normalizeIndex to namespace

Author: kgryte

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

@@ -436,6 +436,15 @@ setReadOnly( ns, 'nextCartesianIndex', require( '@stdlib/ndarray/base/next-carte
 */
 setReadOnly( ns, 'nonsingletonDimensions', require( '@stdlib/ndarray/base/nonsingleton-dimensions' ) );
 
+/**
+* @name normalizeIndex
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/ndarray/base/normalize-index}
+*/
+setReadOnly( ns, 'normalizeIndex', require( '@stdlib/ndarray/base/normalize-index' ) );
+
 /**
 * @name nullary
 * @memberof ns