Added NI category and NI Categories to Employee entity. Marked NI Category as deprecated.

Author: daniel-hutchinson-xero-public

xero-payroll-uk.yaml

@@ -5997,6 +5997,14 @@ components:
           type: string
           format: date-time
           x-is-datetime: true
+        niCategory:
+          $ref: '#/components/schemas/NICategoryLetter'
+          deprecated: true
+        niCategories:
+          description: The employee's NI categories
+          type: array
+          items:
+            $ref: '#/components/schemas/NICategory'
         nationalInsuranceNumber:
           description: National insurance number of the employee
           type: string