Add spatial fields to borough table

[TangoYankee]

Acceptance criteria

The following spatial fields are added to the borough table

• Done concurrently with Populate borough table with spatial fields ae-data-flow#119
• li_ft (long island state plane)
• mercator_fill (mercator of the full shapes)
• mercator_label (mercator of a point on the shape)
• A single migration file contains all three fields