Ensure binary classification targets are bool #33
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When a binary classification dataset which has a target column that is not boolean (so, instead of containing
True/Falseor0/1it contains 2 possible categories represented by strings or numerical values other than 0 and 1), the BinaryClassification metrics fail to get a score.This PR adds a preprocessing step that detects this situation and re-encodes the binary categorical target variable as a boolean array.