Small packaging improvements, that we've been carrying in Ubuntu for a while.
I think those changes would benefit the overall package quality of libcbor (mostly lintian recommendations and enablement of tests).
- set "Rules-Requires-Root: no"
- set "* Build-Depends-Package: libcbor-dev" in .symbols file
- add hardening flags in debian/rules
- enable tests and set the build type to "Release" as shown in the upstream build instructions.