Not sure exactly but I ran into the same dep issue trying to install my old tvh deb package into Mint 20. (focal). I had to remove the debian/.debhelper out of the way before it would compile and build an new package after git pull.
New deb package has these deps.....
Depends: libavahi-client3 (>= 0.6.16), libavahi-common3 (>= 0.6.16), libc6 (>= 2.29), libdbus-1-3 (>= 1.9.14), libdvbcsa1 (>= 1.1.0), libpcre2-8-0 (>= 10.22), libssl1.1 (>= 1.1.1), libstdc++6 (>= 4.1.1), liburiparser1 (>= 0.6.0), libva-drm2 (>= 1.1.0), libva2 (>= 2.2.0), zlib1g (>= 1:1.2.0.2), bzip2
ssl is at 1.1.1.
