Mention zip_fseek() in NEWS.

NEWS.md

diff --git a/NEWS.md b/NEWS.md
index 055c3b4..7891f53 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,7 +1,9 @@
 1.1.x [xxxx-xx-xx]
+==================
 
 * Support legacy zip files with >64k entries.
 * Fix seeking in zip_source_file if start > 0.
+* Add zip_fseek() for seeking in uncompressed data.
 
 1.1.3 [2016-05-28]
 ==================