ci(bithound): tell bithound to ignore stuff in extract/fixtures
ci(bithound): tell bithound to ignore stuff in extract/fixtures

it flags some files as circular, but the whole point of these files is to _be_ circular so they show up in the circular dependency detection algorithm

sverweij/dependency-cruiser,sverweij/dependency-cruiser,sverweij/dependency-cruiser,sverweij/dependency-cruiser