Updated copyright year

Author: radarhere

index.html

@@ -102,7 +102,7 @@ <h3>More</h3>
 
     <div id="footer_wrap" class="outer">
       <div class="inner">
-        <p>&copy; Copyright 1995-2011, Fredrik Lundh, 2010-2019 <a href=
+        <p>&copy; Copyright 1995-2011, Fredrik Lundh, 2010-2020 <a href=
         "https://github.com/python-pillow/Pillow/graphs/contributors">
         Alex Clark and Contributors</a>. Published with <a href=
         "https://github.com/python-pillow/python-pillow.github.io">GitHub