SZ.yaml in countries-3.1.0

- old
+ new

@@ -18,9 +18,10 @@
   subregion: Southern Africa
   world_region: EMEA
   un_locode: SZ
   nationality: Swazi
   postal_code: true
+  postal_code_format: "[HLMS]\\d{3}"
   unofficial_names:
   - Swaziland
   - Swasiland
   - Suazilandia
   - スワジランド