[v0.8.1] - 2021-02-23

This is only a very minor fix-up of /doc/changelog/v0.8.0.

Despite adding tenpy.networks.mps.MPS.term_list_correlation_function_right(), it only contains minor fixes: - the Simulation class didn’t function under windows; some tests were failing. - dtype issues for tenpy.models.model.CouplingModel.add_coupling()