Bug when applying CNOT in reverse

[ba2tro]

Applying CNOT_2->1 to states |01> and |10> returns |01> and |11> respectively. It returns correct answer for other 2 qubit combinations though and works correctly when doing CNOT_1->2.

using QuantumSavory

ra = Register(1)
rb = Register(1)

initialize!((rb[1], ra[1]), L0⊗L1) ## |01⟩
ra.staterefs[1].state[]

apply!((ra[1], rb[1]), CNOT) ## correct: |11⟩ gives: |01⟩ (no change)
ra.staterefs[1].state[]

Shows up in #34