3pl predict function returns predictions with values that exceed 1

[Fordulation]

The predict function in three_param_logistic.py returns:
return lambdas + (1 - lambdas / (1 + np.exp(-discs * (abilities - diffs))))
Which will return predicted scores ranging from 1-2. This contrasts with the 2pl model which appears to correctly return predictions ranging from 0-1. I believe this is missing some parentheses and should be:
return lambdas + ((1 - lambdas) / (1 + np.exp(-discs * (abilities - diffs))))
to match the formula here: https://en.wikipedia.org/wiki/Item_response_theory#Three_parameter_logistic_model

[jplalor]

Fixed! This is now in the latest version. Thanks for your patience.