Bins Model default extent isn't used when all range values are equal #62
Description
When all range values are equal (e.g., when you have a series like [[1, 0], [2, 0], [3, 0]], or [[0, 0]], there are points in the data, therefore the default extent is not used. Since Extents are 2-dimensional, we should probably apply the default extent anytime the data is 1-dimensional, and only apply it according to which dimension is missing.