One fixture record is an array - breaking local build

[karenmajewicz]

This record https://github.com/geobtaa/api/blob/develop/backend/data/fixtures/btaa_fixtures_data/CityOfWaukesha-3eea70a5e4af40a1a558a43705ff8596.json

starts and ends with a square bracket. This seems to be breaking my local build.

[ewlarson]

Closing via #341