scikit-matter : a suite of generalisable machine learning methods born out of chemistry and materials science [version 2; peer review: 3 approved, 1 approved with reservations] - Goscinski, Alexander; Principe, Victor P.; Fraux, Guillaume; Kliavinek, Sergei; Helfrecht, Benjamin A.; Loche, Philip; Ceriotti, Michele; Cersonsky, Rose K.