fix: interface change in h3 library (list instead of set) (#436)

* fix: adjust to h3 library returning list instead of set

* chore: update CHANGELOG

---------

Co-authored-by: Kamil Raczycki <raczyckikamil@gmail.com>

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Issue caused by the change in the `h3-py` library 4.0.0b3 [#431](https://github.com/kraina-ai/srai/issues/431)
+
 ## [0.7.0] - 2024-02-02
 
 ### Added

srai/neighbourhoods/h3_neighbourhood.py

@@ -82,7 +82,7 @@ def get_neighbours_up_to_distance(
         if self._distance_incorrect(distance):
             return set()
 
-        neighbours: set[str] = h3.grid_disk(index, distance)
+        neighbours: set[str] = set(h3.grid_disk(index, distance))
         neighbours = self._handle_center(
             index, distance, neighbours, at_distance=False, include_center_override=include_center
         )
@@ -108,7 +108,7 @@ def get_neighbours_at_distance(
         if self._distance_incorrect(distance):
             return set()
 
-        neighbours: set[str] = h3.grid_ring(index, distance)
+        neighbours: set[str] = set(h3.grid_ring(index, distance))
         neighbours = self._handle_center(
             index, distance, neighbours, at_distance=True, include_center_override=include_center
         )