Bump debhelper from old 12 to 13.

Changes-By: lintian-brush
Fixes: lintian: package-uses-old-debhelper-compat-version
See-also: https://lintian.debian.org/tags/package-uses-old-debhelper-compat-version.html

debian/changelog

+ruby-http-parser.rb (0.6.0-7) UNRELEASED; urgency=medium
+
+  * Bump debhelper from old 12 to 13.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Mon, 06 Sep 2021 14:24:51 -0000
+
 ruby-http-parser.rb (0.6.0-6) unstable; urgency=medium
 
   [ Debian Janitor ]

debian/control

@@ -5,7 +5,7 @@ Uploaders: Pirate Praveen <praveen@debian.org>,
 Section: ruby
 Testsuite: autopkgtest-pkg-ruby
 Priority: optional
-Build-Depends: debhelper-compat (= 12),
+Build-Depends: debhelper-compat (= 13),
                gem2deb,
                libhttp-parser-dev,
                rake,