This is the QFA library in the state that was described in our article:
@article{lippa2020simulations,
title={Simulations of Quantum Finite Automata.},
author={Lippa, G and Makie{\l}a, K and Kuta, M},
journal={Computational Science--ICCS 2020},
volume={12142},
pages={441--450},
year={2020}
}