[boundaries] updates to Taiwan boundaries

resources/boundaries/osm/tw.yaml

@@ -1,11 +1,19 @@
 ---
   admin_level: 
     "2": "country"
-    "4": "state"
-    "5": "state_district"
+    # Except for the streamlined provinces, admin_level=4 is for special cities
+    "4": "city"
+    "5": "city_district"
     "6": "state_district"
-    "7": "state_district"
+    "7": "city_district"
+    # County-controlled cities
     "8": "city"
-    "9": "city"
-    "10": "suburb"
+    "9": "suburb"
 
+    overrides:
+        id:
+            relation:
+                # Taiwan Province
+                "3777248": "state"
+                # Fujian Province
+                "3777250": "state"