Update copyright year in the cgit footer template

Signed-off-by: Michael Straube <michael.straube@posteo.de>
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

web/template/cgit/footer.html

 <div id="footer">
 	<p>
-		Copyright &copy; 2004-2018 aurweb Development Team &ndash;
+		Copyright &copy; 2004-2019 aurweb Development Team &ndash;
 		<strong>AUR packages are user produced content. Any use of the provided files is at your own risk.</strong>
 	</p>
 </div>