Incorporate new outcode regex into sectorRegex

Author: cblanc

index.js

@@ -5,7 +5,7 @@ var validationRegex = /^[a-z]{1,2}\d[a-z\d]?\s*\d[a-z]{2}$/i,
 		validOutcodeRegex = /^[a-z]{1,2}\d[a-z\d]?$/i,
 		areaRegex = /^[a-z]{1,2}/i,
 		districtSplitRegex = /^([a-z]{1,2}\d)([a-z])$/i,
-		sectorRegex = /^[a-z][a-z\d]{1,3}\s*\d/i,
+		sectorRegex = /^[a-z]{1,2}\d[a-z\d]?\s*\d/i,
 		unitRegex = /[a-z]{2}$/i;
 
 function isValidPostcode (postcode) {