Declare compliance with Standards-Version 4.0.1

debian/control

@@ -1,7 +1,7 @@
 Source: file
 Maintainer: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
 Homepage: http://www.darwinsys.com/file/
-Standards-Version: 3.9.8
+Standards-Version: 4.0.1
 Build-Depends: debhelper (>= 9.20141010~),
     dpkg-dev (>= 1.17.14~),
 Build-Depends-Arch: