test: update require path

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/dstructs/named-typed-tuple/test/test.to_string.js

@@ -23,7 +23,7 @@
 var tape = require( 'tape' );
 var hasOwnProp = require( '@stdlib/assert/has-own-property' );
 var isFunction = require( '@stdlib/assert/is-function' );
-var namedtypedtuple = require( './../lib/main.js' );
+var namedtypedtuple = require( './../lib' );
 
 
 // TESTS //