feat: smart method auto timezone

Only used if daily is not empty and timezone wasn't passed as argument.
Also replaces nullable options with empty lists.

Note: don't use empty lists in single endpoints, as it breaks them.

Author: DadiBit

lib/src/main/kotlin/com/openmeteo/api/OpenMeteo.kt

@@ -240,9 +240,9 @@ class OpenMeteo(
         ResponseDaily
 
     operator fun invoke(
-        hourly: Iterable<QueryHourly.Options>? = null,
-        daily: Iterable<QueryDaily.Options>? = null,
-        timeZone: TimeZone? = null,
+        hourly: Iterable<QueryHourly.Options> = emptyList(),
+        daily: Iterable<QueryDaily.Options> = emptyList(),
+        timeZone: TimeZone? = TimeZone.auto.takeIf { daily.any() },
         startDate: Date? = null,
         endDate: Date? = null,
         pastDays: Int? = null,
@@ -359,6 +359,7 @@ class OpenMeteo(
             .reduce { acc, map -> acc + map }
 
 
+
         AnyResponse(
             latitude,
             longitude,