update twig to 2.9

templates/mod/noticeboard.html

@@ -57,7 +57,7 @@
 	</div>
 {% endfor %}
 
-{% if count > noticeboard|count %}
+{% if count > noticeboard|length %}
 	<p class="unimportant" style="text-align:center;word-wrap:break-word">
 		{% for i in range(0, (count - 1) / config.mod.noticeboard_page) %}
 			<a href="?/noticeboard/{{ i + 1 }}">[{{ i + 1 }}]</a>