If onsite/hopping value was supplied to the builder as array-like instead of
proper array, Hamiltonian could be generated silently without any Hermitian
conjugation, if required.

To expose this, `test_builder.py::test_hermitian_conjugation` is
parametrized with different types of values to ensure that Numpy arrays,
tinyarrays, lists and tuples are all conjugated properly.

See issue #406.