Switch to debhelper version 13

debian/control

@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: Debian CMake Team <pkg-cmake-team@lists.alioth.debian.org>
 Uploaders: Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org>,
            Felix Geyer <fgeyer@debian.org>
-Build-Depends: debhelper-compat (= 12),
+Build-Depends: debhelper-compat (= 13),
                freebsd-glue [kfreebsd-any],
                libarchive-dev (>= 3.3.3),
                libcurl4-openssl-dev | libcurl-ssl-dev,

debian/rules

@@ -54,13 +54,9 @@ override_dh_auto_test:
 	# The tests are still run in parallel as debhelper pass -jX as ARGS to ctest.
 	dh_auto_test --buildsystem=cmake -- -j1 ARGS="-E CTestTestUpload --timeout 5000"
 
-override_dh_auto_clean:
-	dh_auto_clean
+execute_after_dh_auto_clean:
 	rm -f $(BUILD_FLAGS_FILE)
 
-override_dh_missing:
-	dh_missing --fail-missing
-
 override_dh_installdocs-arch:
 	# dh_installdocs --link-doc generates binNMU unsafe deps (Bug #747141)
 	dh_installdocs
@@ -73,5 +69,3 @@ override_dh_sphinxdoc:
 
 %:
 	dh $@ --with=sphinxdoc --builddirectory=Build
-
-.PHONY: override_dh_auto_configure override_dh_auto_clean