Access to output values in row hook

When a row hook runs (either at the start of the review step, or when a user changes data), you get access to all of the data in that row. Previously, we would just expose the data in the format shown to the user. Now, row hooks also have access to each cell's outputValue, which is the value exactly as it will appear in the results.

For example, if you have a date field with value: "1/19/1988", that field would now have an additional key, with outputValue: "1988-01-19".