Improve en_AU/Address $postcode by restricting to valid postcodes as per https://en.wikipedia.org/wiki/Postcodes_in_Australia

Author: xfxf

src/Faker/Provider/en_AU/Address.php

@@ -19,7 +19,32 @@ class Address extends \Faker\Provider\en_US\Address
         'Access', 'Alley', 'Alleyway', 'Amble', 'Anchorage', 'Approach', 'Arcade', 'Artery', 'Avenue', 'Basin', 'Beach', 'Bend', 'Block', 'Boulevard', 'Brace', 'Brae', 'Break', 'Bridge', 'Broadway', 'Brow', 'Bypass', 'Byway', 'Causeway', 'Centre', 'Centreway', 'Chase', 'Circle', 'Circlet', 'Circuit', 'Circus', 'Close', 'Colonnade', 'Common', 'Concourse', 'Copse', 'Corner', 'Corso', 'Court', 'Courtyard', 'Cove', 'Crescent', 'Crest', 'Cross', 'Crossing', 'Crossroad', 'Crossway', 'Cruiseway', 'Cul-de-sac', 'Cutting', 'Dale', 'Dell', 'Deviation', 'Dip', 'Distributor', 'Drive', 'Driveway', 'Edge', 'Elbow', 'End', 'Entrance', 'Esplanade', 'Estate', 'Expressway', 'Extension', 'Fairway', 'Fire Track', 'Firetrail', 'Flat', 'Follow', 'Footway', 'Foreshore', 'Formation', 'Freeway', 'Front', 'Frontage', 'Gap', 'Garden', 'Gardens', 'Gate', 'Gates', 'Glade', 'Glen', 'Grange', 'Green', 'Ground', 'Grove', 'Gully', 'Heights', 'Highroad', 'Highway', 'Hill', 'Interchange', 'Intersection', 'Junction', 'Key', 'Landing', 'Lane', 'Laneway', 'Lees', 'Line', 'Link', 'Little', 'Lookout', 'Loop', 'Lower', 'Mall', 'Meander', 'Mew', 'Mews', 'Motorway', 'Mount', 'Nook', 'Outlook', 'Parade', 'Park', 'Parklands', 'Parkway', 'Part', 'Pass', 'Path', 'Pathway', 'Piazza', 'Place', 'Plateau', 'Plaza', 'Pocket', 'Point', 'Port', 'Promenade', 'Quad', 'Quadrangle', 'Quadrant', 'Quay', 'Quays', 'Ramble', 'Ramp', 'Range', 'Reach', 'Reserve', 'Rest', 'Retreat', 'Ride', 'Ridge', 'Ridgeway', 'Right Of Way', 'Ring', 'Rise', 'River', 'Riverway', 'Riviera', 'Road', 'Roads', 'Roadside', 'Roadway', 'Ronde', 'Rosebowl', 'Rotary', 'Round', 'Route', 'Row', 'Rue', 'Run', 'Service Way', 'Siding', 'Slope', 'Sound', 'Spur', 'Square', 'Stairs', 'State Highway', 'Steps', 'Strand', 'Street', 'Strip', 'Subway', 'Tarn', 'Terrace', 'Thoroughfare', 'Tollway', 'Top', 'Tor', 'Towers', 'Track', 'Trail', 'Trailer', 'Triangle', 'Trunkway', 'Turn', 'Underpass', 'Upper', 'Vale', 'Viaduct', 'View', 'Villas', 'Vista', 'Wade', 'Walk', 'Walkway', 'Way', 'Wynd'
     );
 
-    protected static $postcode = array('####');
+    protected static $postcode = array(
+        // NSW
+        '1###',
+        '20##', '21##', '22##', '23##', '24##', '25##',
+        '2619', '262#', '263#', '264#', '265#', '266#', '267#', '268#', '269#', '27##', '28##',
+        '292#', '293#', '294#', '295#', '296#', '297#', '298#', '299#',
+        // ACT
+        '02##',
+        '260#', '261#',
+        '290#', '291#', '2920',
+        // VIC
+        '3###',
+        '8###',
+        // QLD
+        '4###',
+        '9###',
+        // SA
+        '5###',
+        // WA
+        '6###',
+        // TAS
+        '7###',
+        // NT
+        '08##',
+        '09##',
+    );
 
     protected static $state = array(
         'Australian Capital Territory', 'New South Wales', 'Northern Territory', 'Queensland', 'South Australia', 'Tasmania', 'Victoria', 'Western Australia'