0.2.6

Added:

• A strict pregroups mode to the CLI. With this mode enabled, all swaps are removed from the output string diagrams by changing the ordering of the atomic types, converting them into a valid pregroup form.

Fixed:

• Adjusted the behaviour of output normalisation in quantum models. Now, NumpyModel always returns probabilities instead of amplitudes.
• Removed the prediction from the output of the SPSAOptimizer, which now returns just the loss.