Merge pull request #365 from maxmind/dependabot/uv/mypy-2.0.0

Bump mypy from 1.20.2 to 2.0.0

Author: oschwald

maxminddb/reader.py

@@ -220,6 +220,7 @@ def _read_node(self, node_number: int, index: int) -> int:
         base_offset = node_number * self._metadata.node_byte_size
 
         record_size = self._metadata.record_size
+        node_bytes: bytes | bytearray
         if record_size == 24:
             offset = base_offset + index * 3
             node_bytes = b"\x00" + self._buffer[offset : offset + 3]