fixed url in buffer-equal

buffer-equal/buffer-equal.d.ts

@@ -1,5 +1,5 @@
 // Type definitions for buffer-equal 1.0 0
-// Project: https://github.com/chaijs/assertion-error
+// Project: https://github.com/substack/node-buffer-equal
 // Definitions by: Bart van der Schoor <https://github.com/Bartvds>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped