release: prepare for 3.20.4

NEWS

+Major changes in 3.20.4:
+* Don't allow the main view to shrink (Christian Stadelmann)
+* Avoid icons overlaping in the desktop in first run (Iain Lane)
+* Fix crash when no selection (djb)
+* Avoid crash when closing view that is still loading (Ernestas Kulik)
+
 Major changes in 3.20.3:
 * Support HDPI in desktop margins (Andrea Azzarone)
 * Fix opaque desktop background after changing themes (Ernestas Kulik)

configure.ac

@@ -18,7 +18,7 @@ dnl Interface break is not allowed.
 m4_define(nautilus_extension_current,  5)
 m4_define(nautilus_extension_revision, 0)
 
-AC_INIT([nautilus],[3.20.3],[http://bugzilla.gnome.org/enter_bug.cgi?product=nautilus])
+AC_INIT([nautilus],[3.20.4],[http://bugzilla.gnome.org/enter_bug.cgi?product=nautilus])
 
 dnl ===========================================================================