add EUR as default currency for Croatia (#119)

Author: prakhar-flow

data/cleansed/countries.json

@@ -375,7 +375,7 @@
     "continent": "EU",
     "iso_3166_2": "HR",
     "iso_3166_3": "HRV",
-    "currency": "HRK"
+    "currency": "EUR"
   },
   {
     "name": "Cuba",