Release to unstable

debian/changelog

@@ -1,4 +1,4 @@
-ostree (2019.4-1) UNRELEASED; urgency=medium
+ostree (2019.4-1) unstable; urgency=medium
 
   * New upstream release
     - d/libostree-1-1.symbols: Update
@@ -8,7 +8,7 @@ ostree (2019.4-1) UNRELEASED; urgency=medium
   * d/p/debian/Revert-lib-Kill-GPG-agent-when-cleaning-up-tmp-homedirs.patch:
     Drop patch, fixed differently upstream in 2019.4
 
- -- Simon McVittie <smcv@debian.org>  Mon, 30 Sep 2019 11:36:57 +0100
+ -- Simon McVittie <smcv@debian.org>  Tue, 01 Oct 2019 09:30:23 +0100
 
 ostree (2019.3-3) unstable; urgency=medium