Update the status of a voter registration batch.

The current status of the specified batch dictates which batch status values are valid. When a new batch is created via POST /voterRegistrationBatches, it is set to the default status of Entering. From Entering, a batch can only change to Completed. Then, from Completed, a batch can either be changed back to Entering or to Committed. Once a batch is committed, it cannot be changed to any other status. No other status values are accepted.

Changing a status to Committed processes the batch and makes registrants available for searching in the VAN interface.