"telemachus/tapered" is not available
I don't know when this happened, but it seems that one of the submodules that this repository uses is no longer available.
Cloning into '/tmp/knot-resolver/tests/config/tapered'...
fatal: could not read Username for 'https://github.com': No such device or address
fatal: clone of 'https://github.com/telemachus/tapered.git' into submodule path '/tmp/knot-resolver/tests/config/tapered' failed
Failed to clone 'tests/config/tapered' a second time, aborting