d/control: bump debhelper-compat to 12

(after having confirmed with diffoscope this is a no-op change)

Signed-off-by: Holger Levsen <holger@layer-acht.org>

debian/changelog

@@ -9,7 +9,9 @@ debian-cd (3.1.25) UNRELEASED; urgency=medium
   * Stop producing MD5SUMS and SHA1SUMS files by default
 
   [ Holger Levsen ]
-  * Bump standards version to 4.4.0, no changes needed.
+  * d/control:
+    - bump standards version to 4.4.0, no changes needed.
+    - bump debhelper-compat to 12.
 
  -- Steve McIntyre <93sam@debian.org>  Wed, 26 Jun 2019 18:26:02 +0100
 

debian/control

@@ -6,7 +6,7 @@ Uploaders: Raphaël Hertzog <hertzog@debian.org>,
  Santiago Garcia Mantinan <manty@debian.org>,
  Steve McIntyre <93sam@debian.org>,
  Holger Levsen <holger@debian.org>
-Build-Depends: debhelper-compat (= 11)
+Build-Depends: debhelper-compat (= 12)
 Build-Depends-Indep: tofrodos
 Standards-Version: 4.4.0
 Rules-Requires-Root: no