Based on comments received on IRC (debian-mentors), I have made changes.
Increased compat and debhelper version to 11:
* debian/compat: increased compatibility level to 11
* debian/control:
* increased debhelper dependency version to 11
And, altered changelog (removed dh_makeshlibs version from log):
* debian/libddccontrol0.postinst: removed, because ldconfig is called by
trigger added by dh_makeshlibs
* debian/libddccontrol0.postrm: removed, because ldconfig is called by
trigger added by dh_makeshlibs