Fix UpdateCache default file path on Windows

/tmp does not exist on Windows (issue #136)

src/caosadvancedtools/cache.py

@@ -338,7 +338,7 @@ class UpdateCache(AbstractCache):
         return 3
 
     def get_default_file_name(self):
-        return "/tmp/crawler_update_cache.db"
+        return os.path.join(tempfile.gettempdir(), "crawler_update_cache.db")
 
     @staticmethod
     def get_previous_version(cont):