Fix typo in col name, move test to generic test

code_thingies/dbtlearn/models/dim/dim_listings_cleansed.sql

@@ -16,7 +16,7 @@ SELECT
     CASE
         WHEN minimum_nights = 0 THEN 1
         ELSE minimum_nights
-    END AS mininum_nights,
+    END AS minimum_nights,
     host_id,
     REPLACE(price_str,'$','')::money AS price,
     created_at,

code_thingies/dbtlearn/models/dim/dim_listings_with_hosts.sql

@@ -13,7 +13,7 @@ SELECT
     listings.listing_id,
     listings.listing_name,
     listings.room_type,
-    listings.mininum_nights,
+    listings.minimum_nights,
     listings.price,
     listings.host_id,
     hosts.host_name,

code_thingies/dbtlearn/models/schema.yml

@@ -25,3 +25,7 @@ models:
                 'Hotel room'
               ]
 
+      - name: minimum_nights
+        tests:
+          - positive_value
+