Implemented tests for neartest postcode for postcode
Implemented tests for neartest postcode for postcode

ideal-postcodes/postcodes.io,ideal-postcodes/postcodes.io,goingdotin/postcodes.io,goingdotin/postcodes.io,cblanc/postcodes.io,ideal-postcodes/postcodes.io,cblanc/postcodes.io,goingdotin/postcodes.io,cblanc/postcodes.io