adding 'Locker' project

Author: getify

index.html

@@ -58,6 +58,13 @@ <h3>Scheduler</h3>
 		</div>
 		<div class="link" aria-hidden="true">project</div>
 	</a></li>
+	<li><a href="https://github.com/byojs/locker" aria-label="Locker project">
+		<h3>Locker</h3>
+		<div class="description">
+			Exclusive async locks
+		</div>
+		<div class="link" aria-hidden="true">project</div>
+	</a></li>
 </ul>
 <h2>License</h2>
 <p><a href="LICENSE.txt"><img src="https://img.shields.io/badge/license-MIT-a1356a" alt="LICENSE"></a></p>